| Acronym | Meaning |
| CARA | Chemical Assessments And Related Activities |
| FPGS | Folylpolyglutamate Synthetasepar |
| TDM | Time-division Multiplexing |
| LAIS | Liquid Alloy Ion Source |
| APS | Ammonium Persulfate |
| PCE | Tetrachloroethylene (perchloroethylene Or Perk) |
| DWX | Distorted-wave Approxn. With Exchange |
| CMS | Carbogenic Molecular Sieves |
| ICSU | International Council Of Scientific Unions |
| OTC | Ozone Transport Commission |