| Acronym | Meaning |
 | FZDZ | Freezing Drizzle (METAR Code) |
| SST | SuperSonic Transport -Training Submarine (US Navy Hull Classification) - Saturated Suction Temperature (refrigeration Cycles) |
| SOS | Somali Shilling (ISO 4217 Currency Code) |
| EH | Exahenry - Western Sahara (ISO 3166 Digram) |
| PGP | Pretty Good Privacy |
| SNMP | Simple Network Management Protocol |
| AGP | Accelerated Graphics Port |
| RON | Romanian Language (ISO 639-2 Code) |
| SE | Seychelles (FIPS 10-4 Country Code) - South-East - Sweden (ISO 3166 Digram) -Synthetic Environment - System Engineering |
| DSCS | U.S. Defense Satellite Communications System |
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