| Acronym | Meaning |
| BOW | Bond-order Wave |
| EMMA | Energy-dispersive Miniprobe Multielement Analyzer |
| VICAR | Visual Colorimeter For Atmospheric Research |
| PDI | Polarization-division Interferometry |
| HF MO LCAO | Hartree-Fock MO LCAO |
| STD | Sexually Transmitted Disease |
| ITRM | Inverse Thermoremanent Magnetization |
| ACQM | Arrangement-channel Quantum Mechanics |
| AUBF | Anaerobic Upflow Biofilter |
| ETP | Environmental Tracking Procedure |