| Acronym | Meaning |
| PB | Particle Beam |
| T-J MODEL | Heisenberg-Hubbard Model (Hamiltonian) |
| TFRS | Transition Flow Reaction System |
| CCMS | Committee On Challenges Of Modern Society (NATO) |
| AGA | American Gas Association |
| RMP2 | Restricted Moeller-Plesset Second-order (perturbation Theory) |
| GOES | Geostationary Operational Environmental Satellite |
| EPW | Electron Plasma Wave |
| ECR | Electron Cyclotron Resonance |
| POSSUM | Protein Online Substructure Searching - Ullman Method |