| Acronym | Meaning |
| RHLI | Royal Hamilton Light Infantry (Canadian Militia Regiment) |
| JPN | Japan (ISO 3166 Trigram) |
| 3M | Minnesota Mining And Manufacturing Company |
| TANSTAAFL | There Ain't No Such Thing As A Free Lunch (coined By Author Robert A. Heinlein In His The Moon Is A Harsh Mistress) |
| SMIL | Synchronized Multimedia Integration Language |
| MJD | Modified Julian Day |
| CIR | Corotating Interaction Region |
| TIGER | Topologically Integrated Geographic Encoding And Referencing System |
| LG | Latvia (FIPS 10-4 Country Code) |
| NOS | Network Operating System - New Old Stock (Internet Auction/trading Listings) - Nitric Oxide Synthase (enzyme) |