| Acronym | Meaning |
| ORD BBS | ORD Electronic Bulletin Board System |
| PIAS | Photon-counting Image Acquisition System |
| RMR | Resting Metabolic Rate |
| QPMDA | Quasiparticle Mean Density Approxn. (assocd. With Local-d. Theory) |
| ANPP | Aboveground Net Primary Production |
| GTE | Global Tropospheric Experiment |
| BPNN | Back Propagation Neural Network |
| CRS | Coordinate-representation Sudden (decoupling Method For Mol. Inelastic Collisions) |
| ULDPE | Ultra Low Density Polyethylene |
| AGGG | Advisory Group On Greenhouse Gases |