| Acronym | Meaning |
| DF-OCE | Dirac-Fock One-center Expansion |
| HSCT | Hematopoietic Stem Cell Transplantation |
| CAOS | Computer Assisted Organic Synthesis |
| CAMP | Continuous Air Monitoring Program |
| GEOS | Goddard Earth Observing System |
| HSV | Herpes Simplex Virus |
| ICD | Induced Circular Dichroism |
| NETL | National Energy Technology Laboratory |
| RTG | Radioisotope Thermoelec. Generators |
| ICBN | International Code Of Botanical Nomenclature |