| Acronym | Meaning |
| ACS | American Chemical Society |
| EDFA | Er-doped Fiber Amplifier |
| REOS | Remote Electro-Optical Sensor |
| R&D | Research And Development |
| IGHAT | Integrated-gasification Humid-air Turbine [cycle] |
| ABI | Automated Ball Indentation |
| DHF | Decoupled Hartree-Fock |
| ASEAN | Assocn. Of South-East Asian Nations |
| INDO | Intermediate Neglect Of Differential Overlap |
| MBBR | Moving Bed Biofilm Reactor |