English abbreviations from y to yact
- y (Yocto-)
- Y2K (Year Two Thousand)
- yA (Yoctoampere)
- YAA (Anahim Lake Airport (TC: CAJ4))
- YAAB (Young Adult Advisory Board)
- YAAF (Yet Another Application Framework)
- YAB (Arctic Bay Airport (TC: CJX7))
- YABA (Young American Bowling Alliance)
- YABATECH (Yaba College of Technology)
- YABB (Youth Aluminum Baseball Bat)
- YABO (Yet Another Box Opening)
- YaBPr (Yet another Brother Pat rant)
- YABSLAG (Yet another boy singing like a girl)
- YAC (Youth-Adult Committee)
- YACC (Yet Another Compiler Compiler)
- YACHT (Young Americans Challenging High Technology)
- YACT (Young Adult Coordinating Team)
