| Acronym | Meaning |
| PCM | Phase Contrast Microscopy |
| TDCS | Total Dissolved And Colloidal Solids |
| CCS | Classical Centrifugal Sudden (in Calcns. On Reactions) |
| ATAS | Advance Technology Alert System |
| NACE | Nonaq. Capillary Electrophoresis |
| MLCPA | Maximum Likelihood Principal Component Analysis |
| TOF | Turnover Frequency |
| LCR | Ligase Chain Reaction |
| CCIIM | Clearinghouse For Chemical Information Instructional Materials |
| LGM | Linearized Green-function Method (for Electronic-structure) |