| Acronym | Meaning |
| LCMV | Lymphocytic Choriomeningitis Virus |
| ICR | Intelligent Optical Character Recognition |
| ALTER | Acceptable Long-term Exposure Range |
| ITT | Impact Transition Temperature |
| BTU | British Thermal Unit |
| MECI | Monoexcited Configuration Interaction |
| ESEP | Exact Static Exchange (plus) Polarization (potential) |
| DHS | Department Of Homeland Securitypar |
| SSE | Spinless Salpeter Equation |
| CGR | Crack Growth Rate |