| Acronym | Meaning |
| CELDS | Computer Aided Environmental Legislative Data System |
| TPR | Temperature-programmed Reduction |
| DIDG | Diisodecyl Glutarate |
| PSIM | Phase Shifting Interferential Microscopy |
| CATSAT | Cooperative Astrophysics And Technology Satellite |
| NSPS | New Source Performance Standards |
| IPPP | Inner Projections (of The) Polarization Propagator (in Calcns. On Nuclear Spin Coupling) |
| PMN | Polymorphonuclear Leukocyte |
| CLC | Coordinated List Of Chemicals |
| GPUCHF | Geometric Perturbed Uncoupled Hartree-Fock Method |