| Acronym | Meaning |
| PD | Per Diem (Latin: (calculated) By The Day) - Point Of Departure - Police Department - Postal District - Potential Difference - Principal Deputy - Public Domain |
| SRP | Serbian Language (ISO 639-2 Code) |
| EAST | Experimental Advanced Superconducting Tokamak |
| AS | American Samoa (postal Symbol; ISO 3166 Digram) - Australia (FIPS 10-4 Country Code) |
| TACCSF | U.S. Theater Aerospace Command & Control Simulation Facility |
| MDM | Michigan Dartmouth MIT Telescope Consortium |
| SEN | Senegal (ISO 3166 Trigram) -Small Extension Node |
| RRP | Recurrent Respiratory Papillomatosis |
| JSR | Java Specification Request |
| YL | Yottalitre |