| Acronym | Meaning |
| PCT | Patent Cooperation Treaty |
| CME | Chemically Modified Electrode |
| APF | Advanced Particle Filter |
| AMOSC | Australian Marine Oil Spill Center |
| PRTD | Proportional Residence Time Distribution (of Liquid Streams In Equalization Basins In WWT) |
| PRA | Plasma Renin Activity |
| CAFE | Corporate Average Fuel Economy |
| UCP | Uncoupling Protein |
| CCAM | Charge-conserving Approxn. Method (for Quantum Calcns.) |
| INDO/2-AHP | INDO/2-average Hole Potential |