| Acronym | Meaning |
 | RMC | Royal Military College (Australia |
| TJ | Tajikistan (ISO 3166 Digram) - Terajoule |
| EXFOR | Experimental Force (military) |
| PBCK | Problem Between Chair And Keyboard (computer Help Desk In-joke) |
| I/ITSEC | Interservice/Industry Training |
| STR | Short Tandem Repeat (DNA Analysis) |
| YL | Yoctolitre |
| IGY | International Geophysical Year |
| CISB | Complete In Sealed Box (Internet Auction/trading Listings) |
| VLSI | Very-large-scale Integration |
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