| Acronym | Meaning |
| OHMTADS | Oil And Hazardous Materials Technical Assistance Data System |
| HSC | High Conversion Soaker (cracking) [petroleum Viscosity-breaking] |
| MACS | Magnetic Cell Sorting System |
| RKI | Rotary Kiln Incinerator |
| BCPCT | Best Conventional Pollutant Control Technology |
| CCTM | Coupled-channel Transition Matrix (in Atom-surface Scattering) |
| FOPPA | First-order Polarization Propagator Approach |
| IECA | International Erosion Control Association |
| TPEPICO | Threshold Photoelectron-photoion Coincidence |
| TIL | Tumor Infiltrating Lymphocytes |