| Acronym | Meaning |
| VCS | Voluntary Cleanup Section |
| SIIA | Software & Information Industry Association |
| UOP | Universal Oil Products |
| GAPT | Generalized Atomic Polar Tensor |
| ACPTQ | Approx. Coupled Pair (theory Cor. For Connected) Triple And Quadruple Excitations |
| CAHF | Configuration-averaged Hartree-Fock |
| HTTP | Hypertext Transfer Protocol |
| SOCI | Second-order Configuration Interaction |
| SCM | Subsurface Chlorophyll Maximum |
| ATSR | Along-Track Scanning Radiometer |