| Acronym | Meaning |
| NAAQS | National Ambient Air Quality Standards |
| FCO | UK Foreign And Commonwealth Office |
| MR | ATGW -Medium-Range Anti-Tank Guided Weapon |
| MHC | Major Histocompatibility Complex |
| NEI | National Eye Institute - Not Enough Information - Nuclear Energy Institute |
| OIOC | Oriental & India Office Collections (in The British Library) |
| CHI | Computer-Human Interaction |
| PES | PolyEtherSulfone |
| SOX | Sarbanes-Oxley |
| OD | Old Dragon - Ordnance Datum (nautical Charts) -Overdose |