| Acronym | Meaning |
 | PTSD | Post-Traumatic Stress Disorder |
| USNY | University Of The State Of New York (usually Pronounced Use-knee) |
| KC | Kilocoulomb |
| KS | Kansas (postal Symbol) - Republic Of Korea (FIPS 10-4 Country Code) |
| PC | Petacoulomb - U.S. Pacific Islands Trust Territory (ISO 3166 Digram; Obsolete 1986) -Personal Computer - Player Character (roleplaying) - Politically Correct / Political Correctness - Post Cibum (Latin |
| UXO | Unexploded Ordnance |
| LSST | Large Synoptic Survey Telescope |
| ISTC | U.K. Institute Of Scientific And Technical Communications |
| SUN | Sundanese Language (ISO 639-2 Code) |
| UUV | Unmanned Underwater Vehicle |
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