| Acronym | Meaning |
| RAL | Recommended Allowable Limit |
| GIF | Graphic Image Format |
| AAIT | Atomic Absorption Inhibition Titration |
| GRK | G Protein Coupled Receptor Kinase |
| ITT | Impact Transition Temperature |
| GAIIA | Global Alliance Of Information Industry Associations |
| DUVPL | Deep Ultraviolet Projection Lithography |
| PRTD | Proportional Residence Time Distribution (of Liquid Streams In Equalization Basins In WWT) |
| PMO | Perturbational Molecular Orbital |
| GRINSCH | Graded-index Separate Confinement Heterostructure |