| Acronym | Meaning |
| SOMBT | Second-order Many-body Theory |
| SBH | Sequencing By Hybridization |
| APT | Analytic Perturbation Theory |
| IRRS | IR Reflection Spectroscopy |
| OPCW | Organization For Prohibition Of Chemical Weapons |
| MSS | Mobile Servicing Station [space Station] |
| WHSV | Wt. Hourly Space Velocity |
| ROS | Restricted (or Roothaan) Open-shell (Hamiltonian) |
| PRA | Plasma Renin Activity |
| CHAMPP | Computer Hardware |