| Acronym | Meaning |
| STD | Sexually Transmitted Disease |
| HASL | Hypothetical Active Site Lattice |
| MACHO | Massive Compact Halo Object |
| PBL | Peripheral Blood Lymphocyte |
| NMDAR | N-methyl-D-aspartate Receptor |
| AHRQ | Agency For Healthcare Research And Quality |
| HPOTP | High Pressure Oxidizer Turbopump |
| AST | Aspartate Aminotransferase |
| ROS | Restricted (or Roothaan) Open-shell (Hamiltonian) |
| FIOR | Fluid Iron Ore Reduction |