| Acronym | Meaning |
| NISTO | Non-integer Slater-type Orbital |
| FMM | Fast Multipole Method (algorithm For Coulomb Interactions Among Charge Distributions) |
| MMP | Matrix Metalloproteinase |
| PRFT | Partially Relaxed Fourier Transform |
| RIP | Rapid Isothermal Processing |
| ISAW | Interactive Self-avoiding Walk [modeling] |
| ASA | American Society Of Agronomy |
| PDB | Peedee Belemnite |
| MNDOD | Modified Neglect Of Diatomic Overlap With D At. Orbitals |
| HEDS | Human Exploration And Development Of Space |