| Acronym | Meaning |
| AFA | Abstract Factor Anal. (statistics) |
| EICVOM | Equivalent Ionic Core Virtual Orbital Model |
| PETRA | Plasma Engineering And Technology Research Assembly |
| SMAW | Shielded Metal Arc Welding |
| RMP | Relativistic Model Potential |
| IISCI | Initial Ionic State Comfiguration Interaction |
| BHMT | Betaine-homocysteine Methyltransferase |
| ADWIOS | Adiabatic Distorted Wave Infinite Order Sudden |
| CDW | Circumpolar Deep Water |
| LIGO | Laser-interferometer Gravitational-wave Observatory |