English abbreviations from yrr to ysi
- YRR (Stuart Island Airport)
- YRRCSSB (York Region Roman Catholic Separate School Board (subsequently renamed York Catholic District School Board))
- YRS (Red Sucker Lake Airport)
- YRSPP (Yellow Ribbon Suicide Prevention Program)
- YRT (Rankin Inlet Airport)
- YRV (Revelstoke Airport)
- YRW (Yellowstone River Watch)
- ys (Yoctosecond)
- YS/SAS (Youth Services and School Age Services)
- YSA (Young Single Adult (LDS Church))
- YSB (Sudbury Airport)
- YSC (Sherbrooke Airport)
- YSD (CFB Suffield)
- YSE (Squamish Airport)
- YSEP (Young Scientist Exchange Program)
- YSF (Stony Rapids Airport)
- YSG (Youth Study Group)
- YSH (Smiths Falls-Montague Airport)
- YSI (Young Scots for Independence)
