| Acronym | Meaning |
| EEF GTO | Electric Field Gradient Gaussian-type Orbital |
| ELLSA | Enzyme Linked Ligand Sorbent Assay |
| BA | Best Atom (basis Set) |
| PQC | Piezoelectric Quartz Crystal |
| MCT | MOS Controlled Thyristor |
| RTT | Resonant Tunneling Transistor |
| SRCI | Single-reference Configuration Interaction |
| NETAC | National Environmental Technol. Applications Corporation |
| MTC | Magnetization Transfer Contrast |
| CIOSA | Classical Infinite-order Sudden Approxn. |