| Acronym | Meaning |
| APSA | Advanced Photovoltaic Solar Array |
| CONDO | Crystal Orbital Neglect Of Differential Overlap |
| PWSA | Ports And Waterways Safety Act |
| ICSI | Intracytoplasmic Sperm Injection |
| SI | State Interaction Method |
| GT | Gelfand-Tsetlin Basis Function |
| IMS | Incomplete Model Space (in Many-body Calcns.) |
| HRP | Horseradish Peroxidase |
| MALT | Mucosa-associated Lymphoid Tissue |
| RFI | Radio Frequency Interference |