| Acronym | Meaning |
| SIC | Standard Industrial Classification |
| COSTR | Collaborative Solar-Terrestrial Research |
| CNDO/2-U | Universal CNDO/2 (extended To Full Periodic Table) |
| COD | Chemical Oxygen Demand |
| ARRP | Acid Rain Research Program |
| BEST | Basic Extractive Sludge Treatment |
| PAZ | Partial Annealing Zone (fission-track) |
| TMS | Transmission Moessbauer Spectroscopy ~ ~ |
| GIP | Gastric Inhibitory Polypeptide |
| PLCC | Plastic Leadless Chip Carrier |