| Acronym | Meaning |
| NCDS | NASA Climate Data System |
| FCM | Finite-cluster Model (for Calcns. On Electromigration) |
| HDT | High-dose Therapy |
| BHET | Bis(2-hydroxyethyl) Terephthalate |
| OSWER BBS | OSWER Electronic Bulletin Board System (see CLU-IN) |
| NHOMO | Next Highest Occupied Molecular Orbital |
| EUSES | European Union System For Evaluation Of Substances |
| DC | Direct Current |
| NPOX | Nonpurgeable Organic Halide |
| CPF | Cancer Potency Factor |