| Acronym | Meaning |
| IBR | Infectious Bovine Rhinotracheitis |
| PDB | Peedee Belemnite |
| DBRA | Division Of Biometry And Risk Assessment |
| ID | Isotope Dilution |
| ILZRO | International Lead Zinc Research Organization |
| PEMC | Pair-excitation Multiconfiguration (type Of Wave Function) |
| ZSM | Zeolite Socony Mobil |
| BAAQMD | Bay Area Air Quality Management District |
| IFMA | Immunofluorometric Assay |
| GTDA | Generalized Tamm-Dancoff Approximation |