Acronym |
Definition |
| Y/N | Yes or No |
| YAF | Yugoslav Air Force |
| YAH | You Are Here |
| YAK | Yakovlev Aircraft |
| YAK | Yakovlav Aircraft Design Bureau (Russian) |
| YAL | Prototype Attack Laser |
| YANK | Youth of America Needs to Know |
| YAP | Yet Another Pile |
| YAP | Yield Analysis Pattern |
| YAR | Yearly Accomplishment Report |
| YAWA | You And Whose Army |
| YAWA | You And What Army |
| YB | Yard Bird |
| YB | Yankee Bravo |
| YB-35 | Northrop prototype B-35 long-range heavy bomber |
| YB-40 | Prototype B-17 conversion to bomber escort gunship |
| YB-49 | Northrop prototype B-49 Flying Wing Heavy Bomber |
| YBG | Your Best Guess |
| YBH | Yes, But How? |
| YBY | Why Be Yellow |
| YC-125 | Northrop prototype C-125 cargo aircraft |
| YCQ-1 | Fletcher prototype CQ-1 target control aircraft |
| YDA | Your Death Awaits |
| YEA | YES vote |
| YEA | Yaw Error Amplifier |
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