| Acronym | Meaning |
| IUMS | International Union Of Microbiological Societies |
| IIRF | Intergalactic IR Radiation Field |
| MP2-R12 | MP2 Theory With Terms Linear In Interelectronic Distance (r12) |
| AFRSI | Advanced Flexible Reusable Surface Insulation |
| STA | Simultaneous Thermal Analysis |
| ABRF | Association Of Biomolecular Resource Facilities |
| ETS | External Transcribed Spacer |
| AHAM | American Household Appliance Manufacturers |
| CCHW | Citizens Clearinghouse For Hazardous Wastes |
| ATD | Atmospheric Technology Division |