| Acronym | Meaning |
| NDDO | Neglect Of Diatomic Differential Overlap |
| CISS | Constant-initial-state Spectroscopy |
| DMR | Discharge Monitoring Report |
| ESR | Electroslag Refining |
| CCM | Cyclic Cluster Model (in CNDO For Deep Levels In Solids) |
| BHMF | Black Hole Mass Functionpar |
| MEPAS | Multimedia Environmental Pollution Assessment System |
| TO | Topological Orbital (in Graph Theory Of Molecules) |
| PBMS | Particle Beam Mass Spectrometry |
| DELPHI | Detector With Lepton |