| Acronym | Meaning |
| FETI | Fire, Explosion And Toxicity Index |
| MLR | Multilinear Regression |
| RMBPT | Relativistic Many-body Perturbation Theory |
| OCLC | Online Computer Library Center |
| PKI | Public Key Infrastructure |
| CCOM | Coupled Channel Optical Method |
| TOGA | Tropical Oceans And Global Atmosphere |
| PWBA-C-EX | Coulomb Corrected Plane Wave Born Approxn. (with) Exchange |
| RMT | Random Matrix Theory |
| QBO | Quasi-biennial Oscillation (atm.) |