| Acronym | Meaning |
 | AD LOC. | Ad Locum (Latin |
| PY | Paraguay (ISO 3166 Digram) - Person-Year -Portsmouth Yardstick |
| DSR | Deformed Special Relativity |
| LMS | London Mathematical Society - London |
| STA | Scheduled Time Of Arrival - Surveillance And Target Acquisition |
| EMU | Electric Multiple Unit - A Method Of Connecting Self-propelled Railway Vehicles Together To Form A Train Under The Control Of One Driver. |
| EPR | European Pressurised [Nuclear] Reactor |
| ZF | Zettafarad |
| AIAA | American Institute Of Aeronautics And Astronautics |
| HZ | Hertz |
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