| Acronym | Meaning |
| PHOTOSELEX | Photochemical Systematic Evolution Of Ligands By Exponential Enrichment |
| OSM | US Office Of Surface Mining Reclamation And Enforcement |
| RIS | Resonance Ionization Spectrometry |
| SERDP | Strategic Environmental Research And Development Program |
| ECRIS | Electron Cyclotron Resonance Ion Source |
| DELPHI | Detector With Lepton |
| EBL | Extragalactic Background Light |
| HSCR | Hirschsprung Disease |
| SWNT | Single-wall Nanotube |
| GPUCHF | Geometric Perturbed Uncoupled Hartree-Fock Method |