| Acronym | Meaning |
 | ABW | Aruba (ISO 3166 Trigram) |
| TPO | Thrombopoietin |
| NOS | Network Operating System - New Old Stock (Internet Auction/trading Listings) - Nitric Oxide Synthase (enzyme) |
| CRI | Costa Rica (ISO 3166 Trigram) |
| AM | Amharic Language (ISO 639-1 Code) - Attometre |
| BBS | Breeding Bird Survey (North America) - Brigade/Battalion Battle Simulation - Bulletin Board System |
| USPTO | United States Patent And Trademark Office |
| TFMPP | Trifluorophenylmethylpiperazine |
| ANGLICO | Air/Naval Gunfire Liaison Company |
| RRS | Racing Rules Of Sailing |
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