| Acronym | Meaning |
| CCCI | Correlation-consistent CI |
| SCPF | Self-consistent Perturbation Field |
| ESQC | Elastic Scattering Quantum Chemistry |
| NASP | National Aerospace Plane |
| CAREIRS | Conversion And Renewable Energy Inquiry And Referral Service |
| GBH | Gravel Bed Hydroponic System (for Wastewater Treatment) |
| ECP | Exchange Coupled Pair |
| IES | Internal Eliminated Sequence |
| SESAM | Semiconductor Saturable Absorber Mirror |
| CEAS | Cavity-enhanced Absorption Spectroscopy |