| Acronym | Meaning |
| HSPF | Hydrological Simulation Program-Fortran |
| ECCF | Exchange Correlated Crystal Field |
| APEX | Active Plasma Experiment Satellite |
| DMDS | Dimethyl Disulfide |
| ECISDT | Size-extensive CI With Single And Double And Triple Excitations |
| OLS | Online Library System |
| SAM | Scanning Acoustic Microscopy |
| SPLITT | Split-flow Thin [fractionation] |
| AMTIR | Amorphous Material Transmitting Infrared Radiation |
| FOCS | Fiber Optic Chemical Sensor |