PCMCIA	People Can't Memorize Computer Industry Acronyms
ISDN	It Still Does Nothing
APPLE	Arrogance Produces Profit-Losing Entity
SCSI	System Can't See It
DOS	Defunct Operating System
BASIC	Bill's Attempt to Seize Industry Control
IBM	I Blame Microsoft
DEC	Do Expect Cuts
CD-ROM	Consumer Device, Rendered Obsolete in Months
OS/2	Obsolete Soon, Too.
WWW	World Wide Wait
MACINTOSH	Most Applications Crash; If Not, The Operating System Hangs

Contributed by Wally Beddoe to the Oracle Service Humour Mailing List. (thanks to John Vittal)