| 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 |