| Acronym | Meaning |
 | NTDS | Naval Tactical Data System |
| UUID | Universally Unique Identifier (see Also GUID) |
| LCC | Land Component Commander |
| FIN | Finland (ISO 3166 Trigram) |
| UR | Soviet Union (NATO Country Code |
| PIPA | Program On International Policy Attitudes |
| CTC | Closed Timelike Curve (relativity) - (U.S.) Combat Training Center |
| TT | Teratesla -Terrestrial Time - Tourist Trophy (Motorcycle Sport) -Trinidad And Tobago (ISO 3166 Digram) |
| WDC | Western Design Center - World Data Center |
| IHH | Idiopathic Hypogonadotropic Hypogonadism |
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