| Acronym | Meaning |
| EGW | Electrogas Welding |
| PMP2 | (spin) Projected Moeller-Plesset Second-order (perturbation Theory) |
| NAPPA | Nucleic Acid Programmable Protein Array |
| ASM | Activated-sludge Model |
| CMI | Cell-mediated Immunity |
| SCMP | Self-consistent Madelung Potential |
| HGAAS | Hydride Generation Atomic Absorption Spectrometry |
| FIPS | Federal Information Processing Standard |
| JAIE | Japan Association Of Ion Exchange |
| PUHFS | Projected Unrestricted-Hartree-Fock-Slater |