| Acronym | Meaning |
| XH | Xhosa Language (ISO 639-1 Code) |
| RCAF | Royal Canadian Air Force |
| WU | Wabash University - Washington University In St. Louis - Western Union - Windows Update - Work Unit - WU Wien (German Wirtschaftsuniversit?t Wien |
| TSO | The Stationery Office (was HMSO Until 1996) - (U.S.) TRICARE Support Office |
| RSVP | Répondez S'il Vous Plaît. A French Phrase That Translates To "please Respond" And Word For Word Translation Is "respond If You Please." It Is Standard Practice To Reply To An RSVP Request Whether Confirming Attendance Or Declining. |
| RB | Rubidium |
| PAN | STARRS -Panoramic Survey Telescope And Rapid Response System |
| VFA | Volatile Fatty Acid |
| DSAA | (U.S.) Defense Security Assistance Agency |
| NRC | National Research Council (U.S.) - Nuclear Regulatory Commission (U.S.) |