Date: Fri, 1 Jan 93 19:55:32 -0800 
From: bskendig@netcom.com (Brian Kendig)
Subject: The Macintosh Secret Trick List 

Here is my New and Improved Macintosh Secret Tricks List.
Enjoy, and I'll see you at MacWorld in San Francisco!

----------------

                                                          .__________.
  .__________________________________________________.    | Contents |
  |                                                  |    |================|
  |  The Macintosh Secret Trick List                 | .  | Hardware       |
  |  compiled by Brian Kendig (bskendig@netcom.com)  | .  | System         |
  |                                          ____    | .  | Other software |
  |  All-new for 1993!  January edition.    | OK |   | .  | Useful tips .  |
  |                                         `----'   | .  `-------------|\-'
  `--------------------------------------------------' .                |_\
      .................................................    (c)1993 bsk    \


Welcome to the Macintosh Secret Trick List!  A "trick", also known as
a "cookie" or an "easter egg", is something amusing or otherwise
nonproductive (like a poem, a picture, or a song) hidden in a program.
It won't appear unless you do some action you wouldn't normally do, so
you can't find it unless you know what you're looking for.

Some really clever About boxes are mentioned in this list too, and
I've also included a few interesting, useful, and little-known tips
further down that are really handy to know.

Please report corrections to me, no matter how insignificant!  
New info about tricks will be attributed and very much appreciated.

You may (of course!) distribute information about these tricks freely,
but please keep my name on this list if you pass it around whole.
It's okay to distribute this list in electronic format (on disks or
CD-ROMs, over Usenet or BBS's, &c.), but if you'd like to use this
material in a book or newsletter, please contact me first for
permission, and you'll get it.  :-)  It would also be nice to let me
know if you're including this list in a users' group collection, or on
a CD-ROM, or so forth.  So far, this list has been printed in the BMUG
newsletter, translated into Japanese and printed in the Japanese
users' group "MuON" newsletter, used in the upcoming book "Maximizing
your Mac", and distributed on Nautilus and Pacific Hitech CD-ROMs.

Thanks to the people who have written similar lists, from which I've
gotten plenty of ideas: J. D. Sterling Babcock and Mike Kimura, among
others.  For corrections to stuff I had wrong here, thanks go to Paul
Franklin and Seth Pettie.

The list has grown to such a size that I can't personally verify every
trick here, so if you just can't get something to work, please tell me!


  -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

The information below tells what to do to make a trick happen, then
gives away what the trick really is.  If you don't want the trick
spoiled (that is, you don't want to know what it does until you try it
yourself), you can display only the instructions for making it happen
(the lines that begin with an equals sign) with the Unix command

        grep '^=' tricks

where "tricks" is the name of this file.  (Or, have your favorite Mac
text editor remove all lines that don't begin with an equals sign.)

If you want to skip forward to the "Useful Tips" section, have your
software search for three asterisks ('***') now.


= -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
=
=                              Hardware
=
= Macintosh Plus
= From the debugger, enter "G 40E118" (that's a zero, not an oh).
= (To get into the debugger, press the button on the left side of your
= machine closer to the back.  If you're running System 7, just Shut
= Down your machine, then while the "you may turn off your Macintosh
= safely" dialog is displayed, press the button.)
=
  This gives you a tiny "Stolen from Apple Computer" message in the
  upper left-hand corner of your screen.

----------------
= Macintosh SE
= From the debugger, enter "G 41D89A".
= (See the trick above for info on how to get into the debugger.)

  Four bitmap pictures of the Macintosh development team appear as a
  slideshow.  Reboot (hit the button on the left side of the machine
  closer to the front, with the triangle on it) to get out of the
  endless cycle.

= Also, try entering "G 4188A4" into the debugger.
=
  This gives you a tiny "Stolen from Apple Computer" message in the
  upper left-hand corner of your screen.
  (Contributed by J. D. Sterling Babcock)  

----------------
= Macintosh Classic
= Hold down Command-Option-x-o right after you turn on or reboot the
= machine.
=
  The Classic starts up from a minimal ROM-disk which contains
  System 6.0.3, Finder 6.1x, and AppleShare.  (This version of the
  System is not recommended for use with the Classic, so you probably
  shouldn't boot off it to do any important work.)  If you look at
  the ROM-disk with a program able to see invisible files (like ResEdit
  or MacTools), you'll find a folder named "Brought to you by" hidden
  there, containing more hidden folders bearing the names of the Classic
  designers.  (The keys `X' and `O' were chosen because the development
  name of the Classic was the "Mac XO", or was it OX?)  Also, there's
  an invisible application in the System Folder named "Launch" and set
  as the startup application; anybody know what it does?
  (Thanks to Charles Gousha for more info.)

----------------
= Macintosh SE/30 (with MacsBug loaded)
= Press the interrupt switch to dump yourself into the system debugger.
= Use the command "dm 4082E853 20" to display a few bytes of memory from
= location 4082E853 onwards.
=
  The bytes there spell out, in ascii, "WHAT ARE YOU STARING AT?"
  (Contributed by Esa Ristila)

----------------
= Macintosh IIci
= Set the system date to 9/20/89 (the release date of the IIci), and set
= your monitor to 8-bit color.  Restart while holding Command-Option-c-i.
=
  You'll see a color picture of the IIci design team.  Click the mouse
  to continue.  (Other color settings might also work...)

----------------
= Macintosh IIfx
= Set the system date to 3/19/90 (the release date of the IIfx), and
= restart while holding down Command-Option-f-x.
=
  You'll see a color picture of the IIfx design team.  Click the mouse
  to continue.

----------------
= Macintosh ROMs (any of them)
= With a debugger, look at the last few locations on the ROM of your machine.
=
  Developers put their initials there, as well as the date that the ROM
  was linked.  For example, the 128k ROM (Mac Plus) contains, at $41FFC0-
  $41FFFF:
      ALR ELR BA BMB EHB JTC SC DLD PWD KWK LAK SEL BWed, Nov 6, 1985
  which are the initials of ?, Erich Ringewald, Bill Atkinson, Bill Bruffey,
  Ernie Beernik (sp?), Jerome Coonan, Steve Capps, Donn Denmann, Pat Dirks,
  ?, Larry Kenyon, and ?.
  (Contributed by Scott Lindhurst and Ed Tecot)

----------------
= Apple Fax Modem
= While holding down the button on the front panel, turn on the modem.
= The modem will beep three times.  After the three beeps, press the
= button again three times, timed exactly in "rhythm" with the beeps.
=
  If your timing is correct, the modem will speak the digitally-recorded
  voices of the three developers saying their names ("Peter, Alan, Neal").
  (Contributed by Neal Johnson and Alex Rosenberg)


= -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
=
=                               System
=	  ("7.0" means 7.0.0 or 7.0.1 and probably 7.1 also)
=
= Multifinder 1.0 (distributed with System Software prior to 6.0)
= Hold down Command and Option while selecting "About Multifinder"
= from the bottom of the Apple menu.
=
  A scrolling list of credits appears.
  (Contributed by Seth Theriault)

----------------
= Multifinder 6.0
= Select "About Multifinder" and leave the dialog up for about an
= hour or more.  (Yes, this means you can't use your machine meanwhile.)
=
  A message will appear:
    "I want my"
    "I want my"
    "I want my l--k and f--l"
  You can also see this message if you snoop around in the 'STR#'
  resources of Multifinder for a while with ResEdit.
  (Contributed by Tony Cooper and James Boswell)

----------------
= System 6.0.7, 6.0.8, or 7.0
= Take a look through the data fork of the System File (with MacSnoop
= or MacTools, or open it with MS Word).  (It's short.)
=
  The string "Help! Help! We're being held prisoner in a system
  software factory!" is in the data fork, with a list of the names
  of the Blue Meanies (the System 7 developers).
  (Contributed by Kevin Bolduan and Seth Theriault)

----------------
= System 6.0.7J (Kanjitalk)
= Set the clock to January 1, 1992, and restart.
=
  The startup screen says "Happy new year" in Japanese.
  (Contributed by Junio Hamano)

----------------
= System 7.0
= With ResEdit, take a look at STR# resource -16415 in the System file.

  The first string in the resource reads "May you code in
  interesting times."
  (Posted to Usenet by Nigel Stanger)

= Also, while running System 7, try renaming a disk to "Like Wow Man.
= HFS For 7.0!" (where the space after 'Man.' is actually an option-space;
= you'll have to type this somewhere else like the Notepad then cut/paste
= it into the disk name).  Then eject the disk with Command-E, and double-
= click on the greyed-out disk icon.
=
  The Mac will ask you to please re-insert "HFS for 7.0 by dns and ksct".
  (The intials are of David N. Feldman and Kenny S. C. Tung, who wrote
  the HFS extensions for System 7.)  Other disk names work, due to the
  way the name is checked; try "KMEG JJ KS" or "Hello world JS N A DTP".
  (Found by Francois Grieu and mentioned in TidBITS #143)

----------------
= Finder 7.0
= Hold down Option while choosing "About This Macintosh".
=
  (The menu option changes to "About the Finder", and if balloon help is
  turned on, the balloon now reads "Displays a dialog with the original
  Finder picture.")  The original picture of the mountains from "About
  the Finder" in System 1.0 appears.  If the creation date of the
  invisible "Desktop Folder" is May 13, 1991 (System 7's release date)
  or later, the names of all the Finder developers through Mac and Lisa
  history also scroll by.  Hold down Command-Option while choosing
  "About" to get a goofy-face cursor.

----------------
= Caches 7.0.1 (on a Quadra)
= Turn on balloon help and point to the version number.
= Also, try option-clicking on the version number.
=
  The balloon reads "Wink, wink".  Option-clicking makes the "040"
  icon whoosh to the side, revealing the name of the programmer.
  (Contribued by Kemi Jona)

----------------
= Caps Lock 7.0.1 (on a PowerBook 100, 140, 145, or 170)
= Turn on balloon help and point to the Caps Lock file icon.
=
  The balloon help reads: "This file allows your Macintosh TIM or
  Derringer to display an icon..."  (These were the working names of the
  first PowerBooks; Apple forgot to change the extension before System
  7.0.1 was released!  Whoops.)
  (Contributed by Seth Theriault and Fabian Hahn)

----------------
= Color Control Panel 7.0
= Click on the Sample Text a few times.
=
  The strings "by Dean Yu" "& Vincent Lo" alternate.

----------------
= Labels Control Panel 7.0
= Delete all the label names in the Labels control panel, and reboot.
=
  The labels are now "None," "a", "l", "a", "n", "j", "e", "f".

----------------
= Map Control Panel
= Type MID as the city name, and click Find.  Also try: clicking on the
= version number, option-clicking on Find, opening the control panel
= while you hold down shift and/or option, clicking somewhere in the Map
= and dragging off the edge of it, or copying the map from the Scrapbook
= and pasting it while the Map control panel is open.
=
  The stored point MID is actually "Middle of Nowhere", an insignificant
    location in the middle of the South Atlantic.  (This one was added
    in version 7.0.)
  Clicking on the "7.0" puts "v7.0, by Mark Davis" into the city name
    field until you release the mouse button.
  Option-clicking on Find repeatedly will take you alphabetically to
      every city the Map knows.
  Opening the control panel while you hold down the shift key will
    display a magnified map (the resolution is the same, so it's very jagged).
    Opening it with option held down magnifies it more, and shift-option
    magnifies it even more to the point of being really blocky.
  Dragging off the edge of the map will scroll around the world.
  You can paste a new picture into the control panel; the Scrapbook that
    comes with System 7 includes a particularly good color map.
  (Contributed by Takeshi Miyazaki and Doc O'Leary)

----------------
= Memory Control Panel 7.0 (on a machine capable of virtual memory)
= Turn on virtual memory and hold down Option while clicking on the
= pop-up menu used to choose a hard drive for your swapfile.
=
  This brings up a hierarchical pop-up menu with the names of the
  programmers; each name points to a submenu with a few comments.
  (Contributed by Povl Hessellund Pedersen)

----------------
= Monitors Control Panel 7.0
= Click the version number (7.0) in the control panel window.  While you
= hold down the mouse button, tap Option several times.
=
  When you click, a box pops up with the names of the people who wrote
  Monitors.  Pressing Option makes the smiley face stick out its tongue.
  After tapping Option several times, the names begin to get rearranged
  and some first and last names get replaced with "Blue" or "Meanies".

----------------
= Finder 7.0 and MacsBug
= Turn on Balloon Help and point to the MacsBug file.
=
  The balloon reads: "This file provides programmers with information
  proving that it really was a hardware problem..."

----------------
= QuickTime
= Turn on Balloon Help and point to the QuickTime file.

  The balloon reads: "time n. A nonspatial continuum in which events
  occur in apparently irreversible succession from the past to the
  present to the future."
  (Contributed by Kristopher Nasadowski)


= -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
=
=                           Other Software
=
= Adobe Photoshop
= Hold down the Option key and select "About Photoshop".
=
  A dialog crediting "Knoll Software" as the original designers appears.
  (Contributed by Karl-Koenig Koenigsson)

----------------
= Blackjack (the shareware version by Ed Trice)
= Even though the docs say this won't run on anything older than an SE<
= try running it on a Mac Plus.
=
  The dialog reads "This program requires at least a Macintosh SE.
  Please call Smithsonian to donate your antique."
  (Contributed by Mark Nagata)

----------------
= Claris CAD
= Hold down the Option key and select "About Claris CAD".
=
  A system configuration summary appears.
  (Contributed by Karl-Koenig Koenigsson)

----------------
= ColorSnap (comes with the Computer Friends ColorSnap 32+ card)
= Select "About ColorSnap", and click on each of the two programmers' faces.
=
  Clicking on the right face puts him in Freddie Krueger garb and adds the
  caption "Hacking the Freddie Krueger way".  Clicking on the left face
  replaces it with a can of Mountain Dew with the caption "Mountain Dew,
  the programmer's beverage of choice".
  (Contributed by King Rhoton)

----------------
= CompuServe Information Manager 2.0.2
= Option-click on the spinning earth in the About box, and hold the
= mouse button down.
=
  The earth spins in the other direction.  Eventually, other windows will
  appear, giving credit to the authors.
  (Contributed by Rene Ros)

----------------
= Dark Castle
= Try playing the game on December 25 (or set your system's clock to
= that date, and play the game).
=
  A Christmas tree appears in the foyer.
  (Contributed by Philip Craig)

----------------
= DART (Apple's Disk Archiving and Retrieval)
= Select "About DART", and click on the picture of the dartboard.
=
  A credits animation will play; clicking on the text area while the
  credits are displaying will make them go by faster.
  (Contributed by Oliver Breidenbach)

----------------
= Disinfectant
= Select "About Disinfectant", and hold a menu down to pause the
= advancing virus names while the music plays (to prevent the foot
= from arriving too soon and stopping the music).
=
  John Norstad appears in one half of the dialog, while in the other
  half an animated sequence of virus names march out as the Monty Python
  theme song plays, until they get stomped by a huge foot.  Holding down
  a menu pauses the viruses but not the music, and if you hold the menu
  down long enough, the entire theme song (John Philip Sousa's "Liberty
  Bell March") will play!  (You may have to release the mouse button
  every now and then if the music does stop.)
  (Contributed by Dave Claytor and Mitchell Marmel)

----------------
= FaxMaker (the fax utility that comes with the PowerBook 170)
= Click on the icon in the about box.
=
  The arrow pointer changes into a mouse, and a scrolling list of
  the developers appears.
  (Contributed by Fabian Hahn)

----------------
= Finale 2.x
= Select "About Finale" and wait for a few seconds.
=
  The conductor walks away.
  (Contributed by Arthur Rishi)

----------------
= FlashWrite II
= Hold down Option as you select "About FlashWrite II" under the "star" logo.
=
  A Mr. Mojo Risin' quotation appears.
  (Contributed by Dave Claytor)

----------------
= FrameMaker
= Put the word "Interleaf" into a document, and spell-check it.
=
  FrameMaker will substitute "FrameMaker" wherever it finds "Interleaf".
  (Interleaf is FrameMaker's competition.)
  (Contributed by Erik Ableson)

----------------
= HyperCard 2.x
= Hold down Option as you select "About Hypercard...".
=
  In 2.1, you get a dialog describing your system setup.  In either 2.0
  or 2.1, the chooser name, if you've entered one, appears in the
  "HyperCard by" title.  (That is, if you entered "Joe Cool" as your
  name in the Chooser (6.0) or Sharing Setup (7.0), the top of the
  window will read "HyperCard by Joe Cool".  If you have no Chooser
  name, one of the names of the many developers is put there.)
  Also, on any recent Mac (ones that require System 7.0.1 or 7.1),
  you will be told your system is a "Macintosh Macintosh".
  (Thanks to Seth Theriault for more info.)

----------------
= Installer
= On version 3.0.1 (the one that comes with System 6.0.7 and 6.0.8),
= after dismissing the initial welcome dialog, type "ski".

  A humorous list of the developers will appear, and you will be able
  to choose from five wait-cursors: the hand with the moving fingers
  (standard), a spinning globe, the familiar spinning disc, the even
  more familiar wristwatch, and dots that move.
  (Contributed by John DeRosa and John Hawkinson)

= Here's another: On version 3.2 (the one that comes with System 7),
= hold down command and option while the Easy Install screen is up.
=
  The Help button becomes "About", and clicking on it brings up a few
  screens of credits.
  (Contributed by Matthew Russotto)

----------------
= Jam Session
= Choose "About Jam Session".
=
  The credits are displayed on the label of a record, and you can hear
  it click (as an old record does after it's played to the end).  When
  you click the mouse to dismiss the dialog, you hear the scratching
  noise of the needle being lifted off the record.
  (Contributed by Joe Campbell)

----------------
= KiwiEnvelopes! 3.1
= Choose "About KiwiEnvelopes!".
=
  A letter is deposited into a mail truck which then rolls off the screen.
  After it leaves, a marquee shows the names of the development team.
  (Contributed by Dave Claytor)

----------------
= MacDraw Pro
= Hold down Option while selecting "About MacDraw Pro".
=
  The dialog shows your system setup.
  (Contributed by Dave Claytor)

----------------
= MacPaint 2.0 (only the first few copies, …

Showing first 20,000 characters of 36,661 total. Open the full document →

From: DaBexCo@aol.com
Date: Wed, 25 Jan 1995 02:41:30 -0500
Subject: double clicking on Netware

Hi,

I saw your problem (on Info-Mac) about double clicking files and not being
able to launch application on the server.

We have had that problem on some of our macs.  Not all of them though.  I
recently got the latest NetWare client files for the Mac.  On the disk is a
file called Extension Mapper.  I read the ReadMe file on the disk.  Here is
what it says:

( I appologize, this is long.  But I thought all of it would be of interest
to you).


Extension Mapper 1.0 Read Me 

NOTE: The Extension Mapper application works only with NetWare servers
running NetWare for Macintosh 4.0. 
 

== About Extension Mapping ==

Extension mapping associates Macintoshr application information with filename
extensions. The Extension Mapper utility on the Macintosh allows a user to
create and configure his or her own lists of mappings. The same file can be
associated with different icons; users can therefore double-click an icon for
the same file and launch different applications. For example, one Macintosh
user can view a file created with WordPerfectr on a DOS PC as a Microsoft
Wordr file, while another can view it as a MacWriter file.

When using the Extension Mapper, keep these points in mind:

* Extension mapping does not alter the contents or formatting of a file. The
application associated with the file must understand the format of the file
being launched.
  
* Both DOS and Macintosh files are mapped. In the case of a Macintosh file,
the existing Type and Creator is overridden in the Finder TO THE TYPE AND
CREATOR OF THE MAPPING.
 
* Extension mapping does not alter DOS files in any way. However, extension
mapping may cause Macintosh files to have their Type and Creator permanently
changed by the Finderx, or by writing the file.

* The Extension Mapper application provides predefined default extension
mappings. These defaults are listed in the section "Default Extension
Mappings," below. If you double-click a file and the default application
associated with the file is unavailable, the Finder informs you that the
application that created the file cannot be found.

* For the Extension Mapper to work with files stored on server volumes, you
must enable extension mapping at the server with the AFPCON utility. If you
start the utility before extension mapping is turned on at the server, you
must exit the application and restart it in order to see the mappings.
 
* A file named MY.DOCUMENT in the Macintosh name space will have the name
MY.DOC in the DOS name space. As a result, the Extension Mapper interprets
the filename extension as .DOC and maps the filename to the application
associated with the .DOC filename extension. So, you should keep in mind that
a file renamed for the DOS name space may have unexpected mappings.


== Default Extension Mappings ==

These are the default applications and file types associated with each
filename extension:

.APP: Omnis 7r application 
.CSV: Comma-separated values (DOS),  Microsoft Excelr 3.0 (Macintosh)
.DBF: Database file 
.DIF: Visicalcx file (DOS), Microsoft Excel 3.0 (Macintosh)
.DF1: Omnis 7 data file
.DOC: Microsoft Wordr document 
.EPS: Encapsulated Postcriptr file for Adobe Illustrator r'88
.FM: FileMaker Pror file
.GIF: GIF graphic file
.GLY: Microsoft Word glossary
.MPP: Microsoft Projectr 1.x
.MPX: Microsoft Project 1.x Exchange Format
.MPC: Microsoft Project 1.x Calendar
.MPV: Microsoft Project 1.x View
.MPW: Microsoft Project 1.x Workspace
.PM3: PageMakerr 3.0 publication
.PM4: PageMaker 4.0 template
.PT3: PageMaker 3.0 template
.PUB: PageMaker 2.0 publication
.QXD: QuarkXPressr file
.RDY: Symantec Readyx (DOS), Symantec MOREx (Macintosh) 
.RTF: Microsoft Word Rich Text
.SLK: Microsoft Multiplanr (DOS), Microsoft Excel (Macintosh)
.STY: Microsoft Word style sheet
.TEM: PageMaker 3.0 template
.TIF: PageMaker Tiff file
.TPL: PageMaker 3.0 template
.TXT: Text for TeachText
.WKS: Lotus 1-2-3r version 1.x 
.WK: Lotus 1-2-3 
.WK1: Lotus 1-2-3 version 2.x 
.WK3: Lotus 1-2-3 version 3.x 
.WRD: Microsoft Word text document
.XLA: Microsoft Excel 3.0 Workspace
.XLC: Microsoft Excel 3.0 Chart
.XLM: Microsoft Excel 3.0 Macro Sheet
.XLS: Microsoft Excel 3.0 Spreadsheet
.XLT: Microsoft Excel 3.0 Template file
.XLW: Microsoft Excel 3.0 Template file


== Using Different Versions of the Same Application ==

Different versions of the same application may support different file types.
For example, older versions of TeachText do not support the PICT file type,
but newer versions do. If different versions of the same application exist on
any mounted volume, including a hard drive, SCSI volume, NetWare volume, or
AppleSharer volume, the Extension Mapper looks for the file type associated
with the first version of the application it finds. This situation may cause
confusion if the user creates a mapping to a file type not supported by that
version of the application. For example, if the user creates a mapping
between TeachText and the file type PICT, and the version of TeachText found
does not support this file type, the utility informs the user that no file
type PICT exists. 

To solve this problem, try not to keep different versions of the same
application on your system. Or, you can keep the correct version on a volume
that the Finder searches first. The Finder searches the startup volume first,
and then searches the mounted volumes in the order in which you mounted them.
For example, suppose Excel 3.0 exists on a SCSI drive, and that filename
extension .XYZ is mapped to Excel 4.0, located on the startup volume. When a
user double-clicks a file with the .XYZ extension, Excel 4.0 is launched. 


== Changing Extension Mappings ==

If you change an existing extension mapping, you may need to refresh the
Finder before the change becomes active. For example, if the extension .XYZ
is mapped to Microsoft Word and you want to map the extension to WordPerfect
instead, you may need to refresh the Finder and possibly wait a few minutes
before the proper icon appears. To refresh the Finder, either log out of the
NetWare 4.0 server, or quit the Finder. To quit the Finder under System 7.x,
press Control+Option+Command and then press Esc. Be aware, however, that if
you quit the Finder you will disconnect from other services you may be using.


If the server is using the Finder Accelerator Cache, you may need to wait for
the cache entry for your particular folder to age and be refreshed. The time
this operation takes can vary according to usage of the system and the
percentage of free memory allocated to the cache, but it will usually be
negligible. You can also disable the cache at the server by using AFPCON.   

Tip: Closing and reopening the folder window is usually sufficient to refresh
both the Finder and the Finder Accelerator Cache.

=============================
You may be able to find the new client files at Novell's FTP site.  If not, I
can send you the Extension Mapper in BinHex format via e-mail.

Hope all this helps.

Thanks,

Dave Thompson
Chemeketa Community College
e-mail BigWave.Dave@chemek.cc.or.us

Date: Thu, 2 Feb 95 19:10:53 GMT
From: tjfs@tadpole.co.uk (Tim Steele)
Subject: STF Download - 3.1 Modem List

A list of all modems supported by FaxSTF 3.1

--

Aceex   
        9624v   
Adtech Comm-Panion
        14,400 v.32bis  
AIWA    
        PV-AFV144
        PV-PFV144
        PV-AF144V5
        World Comm PV-PF144     
        PV-AF24V5
Anam    
        AFM 24/96RE     
Apple
        Express Fax 14400 for
                PowerBook DuoUs
                (software v1.5.2+)      
        Express Fax for the
                GeoPort Telecom Adapter 
Archtek         
        SmartLink 9614AV v.32bis
Askey   
        1414VQP
Aware   
        514 DBX
        PowerFax 1
        PowerFax 2
Bausch  
        Pocket Modem
Bay Connection  
        Spectra Com FM1414e                             Spectra Com PowerBook                   Spectra Com P1496MX*                    Spectra Com P1414MX/DX*
        Spectra Com FM9642e
        Spectra Com FM9624e
Best Data
        SmartOne Traveler 9624FP        
        SmartOne        
Black Box       
        32 BFX
        24 FX   
Boca    
        14.4 Kbps v.32bis 
                (ROM v1.41E)    
        14.4 Kbps v.32bis               
C & P   
        Mac Tower 144FX         
ComLight        
        Comstar Modem for Macintosh     
        Comstar Highspeed Modem 
Computer Peripherals 
        ViVa 2442ef
CPV 
        v.32bis
CXR 
        WINfast FAX/Data Modem  
Digicom
        Scout Plus
DoveFax
        Pro
        Desktop 
        +
        LE
        PB
Dtronix         
        PowerAccess PB Modem
DynaLink
        9648AM
        1414VE
        9624VAM V.42bis 
        9624AM  
EDISSI
        Porta Fax 9624  
Ericsson
        Semafor 2314C   
E-Tech
        UFOmate P1414MX/DX*
        UFOmate P1496MX*        
Everex
        EMAC
FOCUS   
        14.4 Kbps       
        PowerBook 14.4 Kbps                             24/96   
Global Village
        TelePort Bronze II              
        PowerPort Bronze                
        TelePort Gold
        TelePort Silver 
        TelePort Bronze 
        PowerPort Gold  
        PowerPort Mercury 
                for the PB 100 series           
        PowerPort Mercury 
                for the PB 500 series
        PowerPort Mercury for the PB DUO
GVC     
        144 FM-144VBIS/R1(ROM v2.04)
        SM-144 VBIS (ROM v1.7)* 
        F-1114V/R2 (ROM V3.0)                   9624Vbis        
        Pocket  
        9648    
Hayes
        ACCURA 144+FAX144
                (5100 model series)
        OPTIMA 144+FAX144
        ACCURA 96+FAX96 
        OPTIMA 96+FAX96         
        ACCURA 24+FAX96
        OPTIMA 24+FAX96 
IBISLINK        
        MF 1414
Insung
        FM9624E 
Integran
        MP1414F 
Intel
        SatisFAXtion Modem/400e
Kortex
        KX-Pocket       
LCE     
        126P Datafax Modem              
LightSpeed LightFax 
        9624P   
Logicode
        Quicktel Xeba 14.4
        Quicktel Xeba 9624 v.42bis
MacProducts
        Magic VFX V.32bis (ROM v1.4+)*
        Magic PBK 144*
        Magic VFDX*
        Magic FXM9624   
        Magic FXV9624   
        Magic AFX*
        Magic PKT*      
Macronix
        MaxFax 9696PB
        MaxLite 96
MacWarehouse
        PowerUser 144 FM-144VBIS/R1
                (ROM v2.04)     
        PowerUser F-1114V/R2 (ROM V3.0) 
        PowerUser SM-144 VBIS (ROM v1.7)*       
        PowerUser Pocket
        PowerUser 24/96 
Maestro
        9600XR  
Magnum
        28.8
        14.4
Martignoni Electronics 
        Bullet P1496MX*
        Bullet P1414MX/DX       
MASS Microsystems 
        fmv144
        fmv24/96        
MegaHertz
        PowerBook 144
Micro Electronic
        Pocket  
Midori-Hayes
        OPTIMA 28.8 V.FC+FAX (ROM v3.8) 
        OPTIMA 14400 FAX 144                    OPTIMA 14.4+FAX PKT
Motorola UDS
        FasTalk FAX32
MultiTech
        MT1932 ZDX
        MT1932 BL       
        MT1432 BA
        MT1432 MU
        MT932 BA        
        MT224 BAF (ROM V1.09A)
NetComm
        In Fax PowerBook        
        AutoModem E7F   
        Pocket PA
        AutoModem 24
        Pocket FaxModem 24
        SmartModem E7F  
Nextro
        1414 VQE        
NFX 
        Nova Fax 14400
Nuvo
        Pegasus 14400efx        
        Pegasus 96424efx        
Omron
        MD96XL 10v
        ME1414B
        MD144XT 10v
        Impala 14.4k Pkt
        Impala 24/96
        Intelligent
Outbound
        PocketPort  Fax
Panasonic
        TO-705B Intelligent Fax+Data    
        T0-703B Intelligent Fax+Data    
        TO-702H Intelligent Fax+Data
        T0-700B Intelligent Fax+Data
Piiceon
        PowerBook Dispatcher
Power 
        PK-1440P
Practical Peripherals
        MC288MT II V.FC
        PM14400 FXSA v.32bis
        PM14400 FXMT
        v.32bis Pocket
Pragmatic
        P1414L
Prodem
        Hidem 2442P/FAX
        Hidem 14400P/FAX 
                (Dark Gray Case)
        Hidem 2442/FAX
PSI
        PowerModem IV 96/48
        COMStation Five
        COMStation One
        PowerModem I
SmartLine
        144-MVF
Solectek
        Pocket Fax Modem
Sony
        SMD-280W
SupraFAXModem
        v.32bis (SN 14E 165501+)*
        V.32bis +voice  *
        V.32bis*
        288*
        144 LC*
        V.32*
        Plus
        Powerbook
SVA     
        9624AM
Telebit         
        World Blazer
        T3000
TwinCom
        144 DF
        Commuter 24/96
        Voyager*
Unique Hardware
        FAXsenger II
US Robotics
        Sportster 14400
        Mac+Fax 14400 Sportster v.42bis         HST Dual Standard Terbo
        Courier HST/ASL 16.8
        Sportster 9600
        Sportster 2400 v.42bis
Zoom    
        14.4V*
        28.8
        PKT 144*
        14.4 EX*
        VFX v.32bis (ROM v1.4+)*        
        VFX 24k
        PBK 144*        
        VFDX*   
        VFX v.32*       
        FX9624V
        FXM9624
        AFX*
        PKT*
        PBK*
ZyXEL
        U1496e* 
        U1496*
*       These modems support Line Manager
The majority of the modems listed above support Nova Term  Client Software.

If your modem is not listed Please Call! The list of supported modems is constantly changing as new modems are introduced and available models are tested for compatibility. Support for your modem may have been added after this list was published.

STF Technologies  fax software products support modems which adhere to the following Telecommunications Industry Association standards 
for facsimile communication:
ANSI/TIA-578 Class 1 modems
Class 1 Powerbook & Portable internal modems
Class 1 for Rockwell RC9624AC based modems
Class 1 for Rockwell RC9624ATF based modems
Class 1 for Rockwell RC144AC based modems
Class 1 for AT&T based modems
ANSI/TIA-PN2388 Class 2 modems
PN2388b for Rockwell RC144AC based modems
PN2388b for Rockwell RC9624AC based modems
PN2388b for EXAR based modems
PN2388b for Sierra based modems

STF Technologies, INC.
PO BOX 81
JCT. I-70 & 23 HWY.
CONCORDIA, MO 64020
PHONE: 816-463-2021
FAX: 816-463-7958
BBS: 816-463-1131
To log on, use one of the following:
SITcomm, Microphone or Nova Term

STF Technologies introduces the latest version of our faxing software P FaxSTF v3.1. This full-featured single-user fax software features Grayscale, QuickNote , a new user interface with multiple phonebooks, combine and include, FaxPrint hot key and more! Plus P FaxSTF v3.1 now includes:
STF AutoOCR 
Optical Character Recognition (OCR) technology converts faxes into editable text. Includes German & French OCR libraries.
STF AutoPrint 
Automatically print received faxes to any accessible printer immediately, at a scheduled time, or on command. Also, 
drag-and-drop printing with System 7.
Background Imaging
For faster return to application control. This utility increases productivity by converting standard Macintosh documents to fax format in the background.
CommD
A simple data terminal application which provides basic data communication capability including support for Apple, Hayes and Hayes compatible modems, as well as direct connect serial links. 
Nova Term  Client Software Version 3.1 
A simple data communications package that allows the user to have a graphical interface to our BBS. Downloading updates, new information and technical support questions is one easy step away!

;Files that have been added or modified in the past three weeks.
;This list was created Sun Mar 20 00:00:10 EST 2005.
;
;Flags Size   Modified         File Name
;
-r   4306037 Mar 19 2005 app/bus/transaction-111.hqx
-r  16319905 Mar 19 2005 comm/inet/mail/max-bulk-mailer-413.hqx
-r   5549161 Mar 19 2005 comm/inet/max-news-111.hqx
-r   2858535 Mar 19 2005 comm/inet/web-dumper--223.hqx
-r      1597 Mar 19 2005 help/the-weeks-uploads.txt
-r   1189552 Mar 18 2005 gst/grf/photo-stickies-54.hqx
-r    263632 Mar 18 2005 gst/grf/thumbs-up-41.hqx
-r    152369 Mar 18 2005 gui/x-menu-15.hqx
-r   8875651 Mar 15 2005 prn/photoprinto-11-jp.hqx
-r   8845567 Mar 15 2005 prn/photoprinto-11.hqx
-r     34802 Mar 14 2005 per/tb/tidbits-770.etx
-r    309085 Mar 13 2005 app/bus/tiny-books-21.hqx
-r     39141 Mar 13 2005 per/tb/tidbits-jp-769.etx
-r   4716401 Mar 12 2005 app/bus/qif-master-49.hqx
-r    458153 Mar 12 2005 gst/snd/audio-tools-pro-51.hqx
-r   1709215 Mar 12 2005 text/html/html-optimizer-90-ppc.hqx
-r   2234685 Mar 12 2005 text/html/html-optimizer-90-x.hqx
-r   1937972 Mar 12 2005 text/html/html-optimizer-pro-40-ppc.hqx
-r   2551759 Mar 12 2005 text/html/html-optimizer-pro-40-x.hqx
-r   3083019 Mar 10 2005 edu/math-stars-55.hqx
-r  10533191 Mar 10 2005 game/word/word-sword-10.hqx
-r   3914244 Mar 10 2005 text/html/web-site-maestro-40-osx.hqx
-r   3022456 Mar 10 2005 text/html/web-site-maestro-40-ppc.hqx
-r   7187354 Mar  8 2005 gst/grf/graphic-con-552-jp-cbn.hqx
-r   4955449 Mar  8 2005 gst/grf/graphic-con-552-jp-ppc.hqx
-r     36659 Mar  7 2005 per/tb/tidbits-769.etx
-r   2587553 Mar  6 2005 art/zine/atpm-1103-print.hqx
-r   1143752 Mar  6 2005 game/em-40-demo.hqx
-r   1944384 Mar  6 2005 game/word/hang-man-pro-203.hqx
-r    739789 Mar  6 2005 gst/snd/audiodia-103.hqx
-r     36768 Mar  6 2005 per/tb/tidbits-jp-768.etx
-r   1131969 Mar  5 2005 comm/inet/myallo-11.hqx
-r   1746959 Mar  3 2005 app/time/moms-calendar-35-cbn.hqx
-r   1734671 Mar  3 2005 app/time/moms-calendar-35-ppc.hqx
-r   6996373 Mar  2 2005 prn/disclabel-23-jp.hqx
-r     33537 Feb 28 2005 per/tb/tidbits-768.etx
-r      7428 Feb 27 2005 info/mac-to-vga-adapters-10.hqx
-r     37413 Feb 27 2005 per/tb/tidbits-jp-767.etx
;end

Subject: PowerBook screens 
From: John A Savage <troc@jhunix.hcf.jhu.edu>
Date: Tue, 8 Dec 1992 17:58:24 -0500 

Hi

This is a copy of the report I made about PowerBook LCD displays a week or two
back. Due to numerous requests, I have decided to submit it to you, for the
reports directory, or the digest or whatever is most apropriate. I have never
really done this before, so I hope all goes well.......

********************************************************************************
 This is a more detailed description of how an LCD display works. I will not
 go into detail about the difference between Active/Passive etc. This is
 purely to explain the ScreenSaver effects and things.
 
 For all Chemists out there, I realise this discussion isn't totally accurate
 but it is 'correct' and I can't be bothered to give a lecture course on nematic
 crystals!! :-)

 1. An LCD consists, basically, of two polaroid materials (get those sunglasses
 out!) which are 'crossed' That is, no light passes through them as they cancel
 each other out. To demonstrate this, put two pairs of polaroid sunglasses at
 right angles, no light. Between these polaroids is a 'liquid crystal' This is
 a chemical that 'bends' or 'rotates' light, the more of it there is, the more
 the light is bent. The inside surfaces of the polaroids are coated with a 
 chemical that makes the liquid crystal (nematic) line up, with all the crystals pointing in the same direction. These chemicals ensure that 'at the polaroids
 the nematic lies in the plane of the polaroid. Now, because they are crossed,
 the nematic rotate by 90 degrees as you go from one polaroid th the other.

    -----------  ..... Polaroid
    --> --> -->  ..... nematic

    -> -> -> ->

    |  |  |  |   .... nematic at right angles to other nematic
    -----------

 Now, before with no nematic, no light got through but, because the nematic
 rotates the light which passes through it, the light is rotated by 90 degrees
 by the time it gets through and passes through the bottom polaroid. This is
'OFF' for an LCD and is white (clear, or whatever)

 2. Another property of nematics is that they line up in an electrical field
 apply an current and they all point along it. Well, if we do that to the
 cell above, so that all the nematics are pointing upwards, then they don't
 rotate the light at all, and the LCD goes dark, due to the crossed polaroids

 Well that's it the difference between Active and Passive is down to how the
 different pixels are turned on/off.

 Ok, so what about screen savers, well first you dont need one, as there is
 nothing to burn in, no chemical reaction (or otherwise) occurs, these things
 last for ever (nearly) Second, it is possible that a screen saver that blacks
 the screen could reduce the life of the display as that requires current to
 flow.

 This system relies on the fact that these crystal tend to line up. But at high
 temperatures, they don't line up so well, and bend the light all over the 
 place, causine the screen to go black. All you do is let it cool down and they
 behave again.

 If a display is left on for a while, the picture may 'lock' this is because
 once the current has been turned off, the crystals have to move back to where
 they were before, and this can take some time. Don't worry they realign 
 eventually.

 Liquid Crystal Displays require very small amounts of power and hence produce
 no 'emissions' to worry about (no powerful beams of electrons to Zap you!!!)

 Any questions, don't hesitate to ask

 I hope that helps, anybody near a good library, just find a decent Chemistry
 Textbook on the subject!

 John


:-}

!---------------------------------------!-------------------------------------!
! John Savage : Troc@jhunix.hcf.jhu.edu ! Wot no disclaimer?                  !
!---------------------------------------!-------------------------------------!

Date: Sat, 11 Sep 1993 11:07:50 -0800 
From: thorn@leland.stanford.edu (Shannon Thornburg)
Subject: Macintosh Power Off/On Article 

Several people have requested copies of the article by Tim Oey on turning
Macs on/off and how it affects computer lifetime.  This is information that
everyone who owns a Mac should look at, since it gives guidelines on how
you can make your computer last as long as possible.  Tim has generously
agreed to make the information available electronically.

Here is the latest version of that article, in text format.  See the notes
at the end for more information on distribution guidelines.


(Moderators:  this should probably be archived as something like
info-mac/info/hdwr/power-cycle.txt or off-not-off.txt)



ARTICLE BEGINS HERE

To Off or Not to Off, That Is the Question
 
by Timothy S. Oey
 
Over the years, there has been much controversy about whether it is better to
turn your computer off when it isn't used or leave it on continuously. This is
not a simple question to answer, and as it turns out there are many different,
but valid, answers. For the purposes of this discussion, we'll assume that
"better" means that the computer will last longer.
 
The simple answer to this question is: It's usually best to turn the computer
off whenever it won't be used for 8 hours or more. So if you use your computer
frequently during the day, as many do at work, turn it on in the morning and
off at night. If you use your computer less (a home computer for example), then
it is even more advantageous to turn your machine off. Besides, in both cases
you'll save energy.
 
Now if you'd like a more complete answer, or would like to know the details
behind the above conclusion, please read on.
 
The following information was distilled from numerous conversations with
engineers at Apple Computer, Conner Peripherals, and Quantum Corporation. The
conclusions reached are not necessarily those of any of these companies or the
engineers, but they are an attempt to derive information which the average
computer user should find helpful.
 
To maximize the total number of successful operational hours for any computer
device (i.e., maximize power-on hours), all computer devices (hard disks, CPUs,
monitors, other electronics) should be turned on and left on forever until they
fail. The number of power-on hours is what most engineers measure, and so
they'll tell you to leave your computer on all the time to maximize them.
 
But this does not necessarily mean that you, the user, will maximize the amount
of productive time you get out of the computer. For instance, during the night
the computer may be on but it may not be accomplishing anything for the user.
Let's call this productive time the user's perceived system life span. It's the
span of time over which the user is getting useful work out of the computer.
Users are probably more interested in maximizing their computer's perceived
system life span than the actual number of power-on hours.
 
Regardless of the wear caused by turning your computer on and off, there are
other factors that can have a much greater impact on your computer's life
expectancy. It is very important to treat your computer with care. Although not
the focus of this article, here is a brief list of common sense dos and don'ts
that will help ensure a lasting and worthwhile relationship between you and
your computer:
1. Keep it in a dust/dirt/smoke-free environment.
2. Don't spill things on it. Keep it dry.
3. Use a surge protector.
4. Don't drop it or jar it severely.
5. Use a screen saver to prevent monitor burn-in.
6. Keep it cool (room temperature) and out of the sun.
7. Don't block its ventilation slots.
8. Back up your files -- all systems are guaranteed to fail sooner or later.
 
Before we go on, be reminded that reliability is a complex probabilistic
science. Yes, probability and statistics can be tricky, but they are necessary
for determining when a computer is likely to fail. Manufacturers often use the
term MTBF (Mean Time Between Failures) as an indication of reliability. This
means that, given a large number of computers, the average one will run X hours
before a failure occurs -- X being its MTBF. This does not mean that yours or
mine will last X hours. It only means that ours will probably last about that
long. There is no way that a manufacturer can determine exactly how long any
given computer will last, just as it is not possible to determine exactly how
long you will live, assuming normal circumstances.
 
Manufacturing defects tend to be the single largest cause of computer hardware
failure. Manufacturers cannot guarantee that every device they make is perfect.
However, some are better at minimizing the number of problems that occur.
Apple(R) Computer, for instance, does an amazing amount of testing on all of
its computers and peripherals, as well as keeping close track of failure rates
in the field. Most well-known manufacturers do a good job in terms of design
and manufacturing. You will nearly always be better off, in terms of
reliability, if you buy equipment from reputable manufacturers. This cannot be
stressed enough.
 
The whole point of buying a computer is to accomplish useful work. Be careful
of the tradeoff between cost and the amount of useful work you will be able to
get from your computer. The same goes for disk size, CPU speed, number of
colors, etc. These don't necessarily mean that you will maximize the utility
you get from your computer. Yes, there are worthwhile bargains out there, but
you get what you pay for.
 
Many believe that turning a computer system on is the primary reason for
failure, because most systems fail at this time. This is not necessarily true.
It's just that this is the most likely time for weaknesses to become apparent,
because this is when the computer system undergoes its greatest stress.
Turning your computer on and off regularly (as prescribed above) may be even
more advantageous than it first appears, especially in the first year of
ownership. The stress of turning a machine on and off makes it more likely that
any manufacturing defects will become apparent sooner rather than later -- and
hopefully before the warranty runs out. Once manufacturing defects are weeded
out, it is highly likely that a computer will run for quite a while before wear
causes a failure.
 
Assuming the average benign environment, the most significant causes of wear,
in rough order from most to least, are:
1. Heat
2. Power cycling (turning a machine on/off)
3. Power-on hours
4. Humidity/salt/airborne pollutants
5. Age (yes, some components incur wear even when not used)
 
Heat is a problem because electronic components may burn out if not cooled
sufficiently. Excessive heat can damage any component, especially physically
moving ones such as disk drives. Power supplies are sometimes a bit erratic for
the first few microseconds when first turned on, resulting in initial power
surges. Heating/cooling cycles can cause joint failures due to differing
expansion properties between materials. The various wear factors have the
greatest impact during power-on hours. Monitor phosphors and filaments
eventually burn out. Humidity, salt, and pollutants can corrode various parts.
Simple aging can also have an effect, although this is very small compared with
the others. There are countless other effects related to the above causes -- to
many to enumerate here.
 
Note that turning computer systems on and off vs. leaving them on may not
really matter much for today's average user buying new equipment. Computer
equipment is increasingly well engineered and reliable. It is much more likely
to become obsolete than wear out.
 
Hard disk drives, for instance, are by far the most likely component of a
computer system to wear out because they are mechanical and undergo fairly high
stress. Most of the other components -- power supplies, monitors, logic boards,
other electronics -- last significantly longer in comparison. Since hard disks
are the weakest link in the computer, we'll focus on them for the remainder of
our discussion.
 
Most high-quality hard disk drives are rated for an average of 20,000 on/off
cycles and an MTBF of 25,000 hours or more. If you turn your machine on/off
once a day, it will take 55 years to reach 20,000 cycles. An MTBF of 25,000
hours means that the average hard disk should last about that long, and 25,000
hours is equal to 2.9 years of non-stop running. Again, remember that these
numbers reflect probabilities, not certainties. In testing, hard disks
sometimes survive 100,000 on/off cycles and the equivalent of 1,000,000 hours
of continuous operation. On the other hand, some fail much sooner.
 
<<1993 Update: Since the time this article was first written (Feb 1990), hard
drive reliability has increased.  MTBF ratings for most drives (as of 1993) are
now in the 250,000 to 350,000 hour range. However, the basis for calculating
these hours appears to have changed from an MTBF based on power-on hours to an
MTBF based on total hours (on and off). The drive manufacturers may have
incorporated typical use patterns into their calculations to boost the MTBF
number and perhaps give people a number that on average is more meaningful --
250,000 hours translates to 29 years of average use.  Regardless, while hard
disk drives may or may not be the weakest link in the computer anymore, and
while MTBF ratings for other components may or may not have increased
correspondingly, the logic above and below remains valid even though some
numbers may have changed.>>
 
Now the question is: How much wear does turning a system on and off really
cause? This is something that no one seems to have calculated yet. In fact,
most will not even hazard a guess. However, let's take a crude and somewhat
pessimistic guess that relates on/off wear to power-on-hours wear for
comparative purposes. Let's say that the wear caused by turning a machine on
and off is roughly equivalent to that caused by 8 power-on hours.
 
To do a rough calculation of how long a system will last if we turn it on and
off each day, let's assume that a business computer is on for 8 hours each day,
5 days a week, 52 weeks a year, and that power-off time causes essentially no
wear. Let's also assume that the MTBF for our computer is about 25,000 hours
(this may be optimistic for a whole system, but it's good enough for our
purposes). This yields the following equations, where <life span in weeks> is
the user's perceived life span for the computer system:
 
<on/off wear in hours>
= <life span in weeks> * 5 cycles/week * 8 hours/cycle
= <life span in weeks> * 40 hours/week
 
<power-on wear in hours>
= <life span in weeks> * 5 cycles/week * 8 hours/cycle
= <life span in weeks> * 40 hours/week
 
<<on/off wear in hours> + <power-on wear in hours> = 25,000 hours
 
<life span in weeks> * 40 hours/week + <life span in weeks> * 40 hours/week =
25,000 hours
<life span in weeks> * 80 hours/week = 25,000 hours
<life span in weeks> = (25,000/80) weeks = 312.5 weeks = 6.0 years
 
If we leave the computer on continuously:
 
<on/off wear in hours>
= 0
 
<power-on wear in hours>
= <life span in weeks> * 24 hours/day * 7 days/week
= <life span in weeks> * 168 hours/week
 
<on/off wear in hours> + <power-on wear in hours> = 25,000 hours
 
0 + <life span in weeks> * 168 hours/week = 25,000 hours
<life span in weeks> = (25,000/168) weeks = 148.8 weeks = 2.9 years
 
Notice that the first case yields twice the life span of the second case,
although the actual number of successful power-on hours is halved. A computer
used less frequently would yield even better results.
 
Bottom line: Turn your system off when you won't be using it for 8 hours or
more. But for the most part don't worry about it, because if you bought your
computer system from a reliable manufacturer, it will probably last a very long
time without any hardware failures. It is much more likely to become obsolete
than it is to wear out. Remember that all systems will fail eventually, so keep
backups.
 
 
Copyright (c) 1990, 1993  Timothy S. Oey.  Tim Oey is a project manager at
Apple Computer and the Forum Leader for BikeNet on America Online.  He can be
reached at TheCyclist@aol.com, oey@aol.com or oey@apple.com.  Permission is
granted to distribute this article electronically for free as long as it
remains a complete whole.  Please contact the author if you wish to re-publish
the article in some other form.