| Acronym | Meaning |
| CI | Compression-ignition (engine) |
| NTIMS | Negative Thermal Ionization Mass Spectrometry |
| HDF | Hubble Deep Field |
| ECEPP | Empirical Conformational Energy Program For Peptides |
| LDI | Laser Desorption Ionization |
| CIOS | Complex Infinite Order Sudden (approxn. In Quantum Calcns.) |
| COSS | Correlation Shift Scaling |
| DHB | 2,4-dihydroxybenzoic Acid |
| TCGF | T Cell Growth Factor |
| SERM | Selective Estrogen Receptor Modulator |