Y; Y2K; YA-; Yaa; YABA; yacc; YADE; YAFIYGI; Yahoo; Yale Haskell; Yamaha; yank; YAPS; YASOS; YAUN; Yay; ye; Year 2000; Yellow; Yellow Book; Yellow Book CD-ROM; Yellow Book, Jargon; Yellow Box; Yellow Pages; yellow wire; Yerk; Yet Another; Yet Another Compiler Compiler; Yet Another Yacc; YGMTPO; YLISP; YMMV; YMODEM; YMODEM-G; yocto-; yotta-; yottabyte; You are not expected to understand this; You know you've been hacking too long when...; Yourdon; Yourdon/Constantine; Yourdon/Demarco; Yourdon, Inc.; Yourdon methodology; Your mileage may vary; Yow!; yoyo mode; YP; YSM; yt; YTalk; yu; Yu-Shiang Whole Fish;