X
see ECSTASY

XFER
contraction for transfer

X-TACY
see ECSTASY

XTC
see ECSTASY

YIPPIES
From the "largely fictious" Youth International Party, whose tenets included promiscuity and frequent drug use. Group of hippies who also became some of the first phreakers

ZAIBATSU
A huge friggin' megacorporation. Usually Japanese, but not necessarily. Sony and Microsoft are zaibatsus. [Japanese for corporation. Entered the American vocabulary in large part due to William Gibson’s heavy use of the term.]

ZIMMERMANN, PHILLIP
Guy who invented PGP. The FBI is investigating him, and he might be in big trouble because cryptography is considered munitions and PGP was posted to USENET, which is about as international as you can get, so that violates all sorts of anachronistic outmoded export laws. Zimmermann also used RSA public keys, which is "owned" by Public Key Partners, so they weren’t too happy with him either

ZIPPIES
One of the offshoots of the cyberpunk sub-culture. Basically hippies (or yippies) who discovered the laptop computer. ["Zen Inspired Pagan Professionals"]