| Acronym | Meaning |
| PDA | Photodiode Array |
| MODFET | Modulation-doped Field-effect Transistor |
| GSI | Gonadosomatic Index |
| HIT | Heterojunction With Intrinsic Thin Layer (photovoltaic Cell; Solar Cell) |
| QMMM | Quantum Mechanics-molecular Mechanics ~ |
| SMCM | Spatial Multimedia Compartmental Model |
| EBB | Electronic Bulletin Board |
| OASCR | Office Of Advanced Scientific Computing Research |
| OHCE | One-and-a-half-centered Expansion (method For Calcns. On Charge Transfer In Ion-atom Scattering) |
| AAEE | American Academy Of Environmental Engineers |