| Acronym | Meaning |
 | MN | Manganese |
| RA | Rain (METAR Code) -Rear Area - Reinforced Alert - Republican Army - Right Ascension - Royal Artillery (UK) - Royal Academy |
| TWE | Trans World Entertainment |
| ESD | ElectroStatic Discharge |
| GSOH | Good Sense Of Humour |
| PR | Praseodymium |
| C | Carbon - Coulomb - One Hundred (in Roman Numerals) |
| MOW | Maintenance Of Way (also MW) |
| DCYSC | Discovery Channel Young Scientist Challenge |
| HGC | UK Human Genetics Commission |
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