| Acronym | Meaning |
| EFV GTO | Electric-field-variant Gaussian-type Orbital |
| IWOP | Integration Within (an Ordered Product Of) Operators |
| ACD | Atmospheric Chemistry Division |
| SETB | Semiempirical Tight Binding |
| CSA | Coupled Static Approxn. (in Scattering Calcns.) |
| CHAMPP | Computer Hardware |
| TFPI | Tissue Factor Pathway Inhibitor |
| MOST | Metal Oxide Semiconductor Transistor |
| TEELS | Transmission Electron Energy Loss Spectroscopy |
| PMC | Percent Modern Carbon |