| Acronym | Meaning |
| PISA | Pair Interaction Structureless Approximation |
| ISC | Short-circuit Current |
| FRAT | Free Radical Assay Technique |
| RPI | Radius Polydispersity Index |
| EWIA | Eikonal (distorted) Wave Impulse Approxn. (for Scattering) |
| AAIW | Antarctic Intermediate Water |
| PPHM | Parts Per Hundred Million |
| MCDW | Matrix Continuum Distorted Wave |
| EPS | Emission Preprocessor System |
| DIP | Document Image Processing |