| Acronym | Meaning |
| CINO | Configuration Interaction Natural Orbital |
| PCET | Proton-coupled Electron Transfer |
| ICS | Inhaled Corticosteroid |
| IGSCC | Intergranular Stress Corrosion Cracking |
| ANO | Atomic Natural Orbital |
| PAT | Proficiency Analytical Testing (NIOSH) |
| CPE | Coulomb Wave-plane Wave (description With) Effective Screening |
| PZC | Point Of Zero Charge (of Water) |
| UEGO | Universal Exhaust Gas Oxygen Sensor |
| CMBR | Cosmic Microwave Background Radiation |