| Acronym | Meaning |
| PM | Picometre |
| EU | Europium |
| LJ | La Jolla - Larry Johnson - LaserJet - Library Journal - Linux Journal - LiveJournal - Ljubljana - Lord Justice Of Appeal -Sierra National Airlines (IATA Code) |
| A.K.A. | Also Known As |
| R&B | Rhythm And Blues |
| LGB | Lesbian |
| USAFSPC | U.S. Air Force Space Command |
| IO | British Indian Ocean Territory (ISO 3166 Digram; FIPS 10-4 Territory Code) |
| LNB | Low-Noise Block (Satellite Dish) |
| PCL | Passive Coherent Location |