English abbreviations from ycx to ydx
- YCX (CFB Gagetown (heliport))
- YCY (Clyde River Airport)
- YCZ (Fairmont Hot Springs Airport)
- YD (Yaw damper)
- YDA (Dawson City Airport)
- YDB (Burwash Airport)
- YDC (Drayton Valley Industrial Airport (TC: CER3))
- YDCB (Yu Da College of Business)
- YDE (Paradise River Airport (TC: CDF4))
- YDF (Deer Lake Regional Airport)
- YDFA (Ytterbium-Doped Fiber Amplifier)
- YDG (Digby/Annapolis Regional Airport)
- YDH (Daniel's Harbour Airport)
- YDI (Davis Inlet Airport (TC: CCB4))
- YDK (Main Duck Island Airport)
- YDL (Dease Lake Airport)
- YDN (Lt. Col W.G. (Billy) Barker VC Airport)
- YDO (Dolbeau-Saint-Félicien Airport)
- YDP (Nain Airport)
- YDQ (Dawson Creek Airport)
- YDR (Broadview Airport)
- YDS (Yosemite Decimal System (climbing))
- YDT (Boundary Bay Airport)
- YDU (Yttrium-Doped Ultrathin film)
- YDUK (Young Dementia United Kingdom)
- YDV (Bloodvein River Airport)
- YDW (Obre Lake/North of Sixty Airport (TC: CKV4))
- YDX (Doc Creek Airport)