| Acronym | Meaning |
| IACIS | International Association Of Colloid And Interface Scientists |
| IID | Ion Impact Desorption |
| BSSEC | Basis-set Superposition Error Correction |
| PERC | Passivated Emitter And Rear Cell (solar Cells) |
| AGU | American Geophysical Union |
| BIR | Baculovirus IAP Repeat |
| ISGO | International Structural Genomics Organization |
| CLCR | Creatinine Clearance |
| WTQA | Waste Testing And Quality Assurance |
| LDEF | Long Duration Exposure Facility (for Spacecraft Material Testing) |