| | | |
| ORDNANCE VEHICLE PARKS | |
| OTU BAIRNSDALE | |
| OTU EAST SALE | |
| OTU MILDURA | |
| OTU TOCUMWAL | |
| OTU WAGGA | |
| OTU WILLIAMTOWN | |
| OTUS | |
| OXLEY REGIMENT | |
P unit names | |
Q unit names | |
R unit names | |
S unit names | |
T unit names | |
U unit names | |
| U BOATS | |
| U HEAVY BATTERY | |
| UN PEACEKEEPING FORCES | |
| UNAMIR - UN ASSISTANCE MISSION IN RWANDA | |
| UNIFIL - UN INTERIM FORCE IN LEBANON | |
| UNITAF UNIFIED TASK FORCE IN SOMALIA | |
| UNITED NATIONS | |
| UNITED NATIONS PEACEKEEPING FORCES | |
| UNITED PROTESTANT ASSOCIATION | |
| UNITED STATES AIR FORCE | |
| | BT AIR FORCE UNITS | |
| | NT 35 FIGHTER INTERCEPTOR GROUP USAF | |
| | NT 4 FIGHTER INTERCEPTOR WING USAF | |
| | NT 49 FIGHTER GROUP USAF | |
| | NT 54 TROOP CARRIER WING USAF | |