| Acronym | Meaning |
| PERTCI | Perturbational Configuration Interaction |
| CISTI | Canadian Institute For Scientific And Technical Information |
| HIAA | Hydroxyindoleacetic Acid |
| GCCP | Global Climate Change Program |
| CGCT | Constrained Geometry Catalyst Technology [polymerization] |
| CAALS | Consortium On Automated Analytical Laboratory Systems |
| PTR | Photothermal Radiometry |
| TDGI | Time-dependent Gage-invariant (quantum Calcn. Method) |
| SEPT | Secular Equation (with) Perturbation Theory |
| CAMEO | Color Augmented Microscopy By Electromagnetic Offset |