| Acronym | Meaning |
| TEIL | Two-electron Ionization Ladder (wave Function) |
| TRM | Thermoremanent Magnetization |
| CIRA | COSPAR International Reference Atmosphere |
| VOST | Volatile Organic Sampling Train |
| OSTI | Office Of Scientific And Technical Information |
| IAH | International Association Hydrogeologists |
| HVAC | Heating, Ventilating, Air-conditioning |
| UDI | Utility Data Institute (power Generation) |
| VLA | Very Large Array |
| SPMD | Semipermeable Membrane Device |