| Acronym | Meaning |
 | SAS | Scandinavian Airline Systems - Second Avenue Subway - Situational Awareness System - Special Air Service - Studies |
| ST | Saint Lucia (FIPS 10-4 Country Code) - S?o Tom? And Prncipe (ISO 3166 Digram) |
| RTA | Road Traffic Accident (British) |
| W/O | Without: Software W/o Documentation |
| WIPP | [Nuclear] Waste Isolation Pilot Project |
| UNDE | Union Of National Defence Employees (Canada) |
| IRST | Infra-red Search And Track |
| RCA | Radio Corporation Of America - Root Cause Analysis - Royal Canadian Artillery - Royal City Avenue (famous Entertainment Zone In Thailand) |
| KA | Kamov Design Bureau |
| IVM | In Vitro [Oocyte] Maturation |
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