| Acronym | Meaning |
| PTCR | Positive Temperature Coefficient Of Resistance (of Semiconductors) |
| ITC | Isothermal Titration Calorimetry |
| EAS | Extensive Air Shower |
| BTK | Bruton Tyrosine Kinase |
| ECT | Emission-Computed Tomography |
| SA-LCAO | Symmetry-adapted Linear Combination Of Atomic Orbitals |
| ACL | Analytical Chemistry Laboratory |
| EIG | Electrostatic Ion Guide |
| PMAMS | Patterned Multi-array |
| IRIS | Incorporated Research Institutes For Seismology |