| Acronym | Meaning |
| ITRC | Interstate Technology And Regulatory Cooperation Working Group |
| GAMETAG | Global Atmospheric Measurements Experiment Of Tropospheric Aerosols And Gases |
| GMQDT | Generalized Multichannel Quantum Defect Theory |
| RSM | Reduction Symmetry Method (in Crystal Field Theory) |
| SDD | Silicon Drift Detector |
| NEEIA | Nonseparation Electrochemical Enzyme Binding/immunoassay |
| PIRR | Polarized IR Reflection |
| ALMA | Atacama Large Millimeter Array |
| GNVP | Generalized Newton Variational Principle |
| ALU | Arithmetic Logic Unit |