| Acronym | Meaning |
| ACP | Approximate Coupled-pair (method For Correlation-energy Calcn.) |
| HMTC | Hazardous Materials Technical Center |
| OCR | Optical Character Recognition |
| ISES | International Solar Energy Society |
| ICAO | International Civil Aviation Organization |
| NCRPM | National Council On Radiation Protection And Measurements |
| IGY | International Geophysical Year |
| COMA | Cyclic Olefin Maleic Anhydride |
| BFGF | Basic Fibroblast Growth Factor |
| UASBR | Upflow Anaerobic Sludge Blanket Reactor |