Or forgot what we learned. I finished high school 21 years and 5 months ago.  

When I started school, Commodore PET was the new "easy" computer and my school was the lucky few to have some in library.  Finished Wines school with C64 and Apple II. Finished middle school with IBM PS/1 (the odd looking one that looks like early Macintosh style ZFP hard drive under a mono display) series and Apple IIgs