| Acronym | Meaning |
| CARPT | Computer Automated Radioactive Particle Tracking |
| PUMP | Projected Unrestricted Moeller-Plesset |
| BOA | Bidirectional Orbital Approximation (in Valence Bond Theory) |
| RRHO | Rigid Rotor-harmonic Oscillator (approxn.) |
| ICSS | Isobaric Crystallization From Supercritical Solution |
| CBEDP | Convergent-beam Electron-diffraction Pattern |
| TDC | Top Dead Center |
| FAMA | Fluorescent Antibody Membrane Antigen |
| ALEX | Aerosol LIDAR Experiment |
| HELP | Hydrologic Evaluation Of Landfill Performance Model |