| Acronym | Meaning |
| HECD | Hall Electrolytic Conductivity Detector |
| OLO | On-line Optimization |
| PNO-CEPA | Pseudonatural Orbital-coupled Electron Pair Approximation |
| NRC | National Research Council |
| QDPT | Quasi-degenerate Perturbation Theory |
| CFS | Coherent Forward Scattering |
| ALEPH | Apparatus For LEP PHysics |
| IDSA | Infectious Diseases Society Of America |
| MCM | Multichip Modules |
| ESC | Embryonic Stem Cell |