| Acronym | Meaning |
| ECR | Electron Cyclotron Resonance |
| GCB | Graphitized Carbon Black |
| TED | Transmission Electron Diffraction |
| APDG | Antisymmetrized Product Of Delocalized Geminals (wave Function) |
| RFT | Respirator Fit Test |
| ESID | Environmental Statistics And Information Division |
| FOCAPD | Foundations Of Computer-aided Process Design |
| PDPA | Phase Doppler Particle Analyzer |
| ASPCR | Allele-specific Polymerase Chain Reaction |
| ESA-IRS | European Space Agency-Information Retrieval Service |