| Acronym | Meaning |
| TTSS | Type III Secretion System |
| PCPI | Permanent Committee On Patent Information |
| ETBM | Empirical Tight-binding Method (in Electronic Structure Calcn.) |
| RET | Resonance Energy Transfer |
| BHMT | Betaine-homocysteine Methyltransferase |
| GOEZS | Global Ocean Euphotic Zone Study |
| HSC | Health And Safety Commission (UK) |
| CRM | Continuous Radon Monitor |
| STERAO | Stratosphere-Troposphere Experiments: Radiation |
| GOCART | Georgia Tech/Goddard Global Ozone Chem. Aerosol Radiation And Transport Model |