| Acronym | Meaning |
| USW | Ultrasonic Welding |
| LSM | Layered Synthetic Microstructure |
| PTD | Probable Toxic Dose |
| MBMS | Molecular Beam Mass Spectrometry |
| SIV | Simian Immunodeficiency Virus |
| FDDI | Fiber-Distributed Data Interface |
| HPMC | Hydroxypropyl Methylcellulose |
| UEATC | European Union For Technical Agreements In Construction (French; L'Union Europeenne Pour L'Agrement Technique Dans La Construc |
| SIOS | Semiclassical Infinite-order Sudden (in Rotationally-inelastic Scattering Calcns.) |
| EHC | Environmental Health Committee |