This is the information available at http://docs.info.apple.com/article.html?artnum=2238 and by prior search in these Forums. You should print it out and nail the printout to your refrigerator door, or somewhere else convenient:

Contents of PRAM

Some Macintosh computers may not have all the settings described below. For Mac OS X information, refer to Mac OS X: What's Stored in PRAM?

Status of AppleTalk

Serial Port Configuration and Port definition

Alarm clock setting

Application font

Serial printer location

Autokey rate

Autokey delay

Speaker volume

Attention (beep) sound

Double-click time

Caret blink time (insertion point rate)

Mouse scaling (mouse speed)

Startup disk

Menu blink count

Monitor depth

32-bit addressing

Virtual memory

RAM disk

Disk cache

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