| Acronym | Meaning |
| MNDO/H | MNDO For H-bonded Systems |
| NGC | New General Catalog Of Nebula And Clusters Of Starspar |
| PNET | Primitive Neuroectodermal Tumor |
| EFTA | European Free Trade Association |
| ISTS | Impulsive Stimulated Thermal Scattering [a Laser-based Ultrasonic Technique] |
| HPIAC | High-performance Immunoaffinity Chromatography |
| BLB | Brillouin-Levy-Berthier (theorem In MO Theory) |
| CDW-IA | Continuum Distorted Wave-impulse Approxn. |
| SUCCESS | Subsonic Aircraft: Contrail And Cloud Effects Special Study |
| NDSC | Network For The Detection Of Stratospheric Change |