| Acronym | Meaning |
 | CLEC | Competitive Local Exchange Carrier |
| HS | Hassium |
| USA | United States Of America (alsoISO 3166 Trigram) - United States Army |
| BGN | U.S. Board On Geographic Names -Bulgarian Lev (ISO 4217 Currency Code) |
| FOE | Friends Of The Earth |
| PI | P?li Language (ISO 639-1 Code) |
| HOPI | Hybrid Optical And Packet Infrastructure (see Internet2 |
| EDH | Eastman Dental Hospital |
| PKI | Public Key Infrastructure (cryptography) |
| BOS | Battlefield Operating System |
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