| Acronym | Meaning |
| ACCD | Approximate Double Substitution Coupled Cluster Method |
| TLS | Two-level System (with Tunneling Transitions Between Wells Of Double-well Potential) |
| RPEHMO | Relativistically Parametrized Extended Hueckel MO |
| DGT | Diffusive Gradients In Thin Films |
| RVDT | Rotary Variable Differential Transformer |
| CIE | Computer-integrated Engineering |
| HPA | Hydroxypropyl Acrylate |
| ODCPA | Off-diagonal (disorder) Coherent-potential Approxn. |
| PT2F | Second-order Perturbation Theory (with) Fock (matrix) |
| CRF | Chromatographic Response Function |