| Acronym | Meaning |
 | A4 | Many |
| ADA | Air Defence Artillery - American Dental Association - Assistant District Attorney - Americans With Disabilities Act (see Also The Similar But Non-acronymic Ada Programming Language) |
| DFM | Dynamic Flowgraph Methodology |
| PCP | Phencyclidine - Pneumocystis Jiroveci Pneumonia (formerly Peumocystis Carinii) -Probabilistically Checkable Proof |
| PLAID | Precision Location And Identification |
| ABSTRIPS | Abstraction-Based STRIPS |
| XIII | Thirteen (in Roman Numerals) |
| PKT | Pulemet Kalashnikova Tankoviy (Russian ??? ??????? ??????????? ???????? |
| SLP | Sea Level Pressure |
| DEU | Germany (ISO 3166 Trigram) |
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