| Acronym | Meaning |
| AISI | American Iron And Steel Institute |
| RIA | Regulatory Impact Analysis |
| ITTFA | Iterative Target Transformation Factor Analysis |
| IDWSSD | International Drinking Water Supply And Sanitation Decade (of UN |
| BSSEC | Basis-set Superposition Error Correction |
| SERRS | Surface-Enhanced Resonance Raman Spectroscopy |
| MRSD-CI+D | MRSD-CI (with) Davidson Correction |
| GPHS | General Purpose Heat Source |
| CPCPI | Chemical Protective Clothing Performance Index |
| LMC | Large Magellanic Cloud |