| Acronym | Meaning |
 | OIOC | Oriental & India Office Collections (in The British Library) |
| OTC | Over-The-Counter (drugs) |
| HORECA | Hotel |
| KT | Kilotesla |
| C/S/A | CINC |
| NDU | National Defense University (Washington |
| PGCE | Postgraduate Certificate In Education |
| MG | Magnesium - Megagram |
| GSM | General Service Medal - Grams Per Square Metre (paper Thickness; Properly G/m?) - Ground Station Module - Groupe Sp?cial Mobile (French |
| IR | Infrared - Intelligence Requirement (military) -Iran (FIPS 10-4 Country Code; ISO 3166 Digram) - Iran Air (IATA Alpha Code) See Entry For More |
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