| Acronym | Meaning |
 | BTP | British Transport Police |
| MPEG | Motion Pictures (Coding) Experts Group |
| TLA | Three-Letter Abbreviation/Acronym |
| KC | Kilocoulomb |
| PDD | Past Due Date - Presidential Decision Directive |
| LL | Land Line (telephone) - Last Log - Late Latin - Left Limit - Lex Luthor (Superman Character) - Light Line - Limited Liability - Linked List - Little League |
| IY | Iraqi-Saudi Neutral Zone (FIPS 10-4 Territory Code; Obsolete 1993) |
| J9 | Joint Public Affairs Directorate (Civilian-Military Cooperation) |
| SQ | Sound Quality |
| OTA | Office Of Technology Assessment -Orthodontic Technicians Association |
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