| Acronym | Meaning |
 | RAF | Red Army Faction - Royal Air Force |
| SMH | Shaking My Head |
| TANJ | There Ain't No Justice (used As Expletive In The Ringworld Novels) |
| ASR | Anti Slip Regulation |
| TS | Terasiemens - Thunderstorm (METAR Code) - Tunisia (FIPS 10-4 Country Code) -TinySex - Transsexual |
| MPSI | Member Of The Pharmaceutical Society Of Ireland |
| EPIRB | Emergency Position Indicating Radio Beacon |
| IAB | International Association For Biologicals |
| NARA | (U.S.) National Archives And Records Administration |
| NBA | National Basketball Association |
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