| Acronym | Meaning |
| RPG | (US-CA) Regional Planning Group - Report Program Generator - Rocket Projectile Gun - Rocket-Propelled Grenade - Role-Playing Game |
| COIN | Counter-Insurgency (military) |
| RPA | Regional Plan Association |
| PLM | Polarized Light Microscope/Microscopy |
| BO | Back Orifice -Belarus (FIPS 10-4 Country Code) - Bolivia (ISO 3166 Digram) -Body Odor |
| LN | Lingala Language (ISO 639-1 Code) - Natural Logarithm |
| ROZ | Restricted Operations Zone |
| BU | Bulgaria (FIPS 10-4 Country Code) - Burma (ISO 3166 Digram; Obsolete Since 1989) |
| YL | Yoctolitre |
| GIMP | GNU Image Manipulation Program |