| Acronym | Meaning |
 | PKI | Public Key Infrastructure (cryptography) |
| COS | Cooper Ornithological Society |
| PNS | Pensacola |
| WSTC | Women Signallers Territorial Corps (WWII UK) |
| RW | Rwanda (ISO 3166 And FIPS 10-4 Country Code Digram) |
| WRVS | Women's Royal Voluntary Service |
| DZ | Algeria (ISO 3166 Digram) - Drizzle (METAR Code) -Drop Zone |
| CPE | Certificate Of Proficiency In English |
| FY | West Frisian Language (ISO 639-1 Code) |
| WNF | Will Not Fix |
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