| Acronym | Meaning |
| ISDN | Integrated Services Digital Network |
| ABR | Anaerobic Baffled Reactor (for Wastewater Treatment) |
| HPT | High Precision Translator |
| DAB | Diaminobenzidine (usually 3,3') |
| PAPS | Phase-alternated Pulse Sequence |
| EPC | Evaporative Pattern Casting |
| SSCP | Single-strand Conformation Polymorphism |
| TIME | Test, Inspect, Measure, And Evaluate |
| QUPID | Quantum Path Integral (mol.) Dynamics (method In Mol. Calcns.) |
| IHC | Interim Hazard Classification |