| Acronym | Meaning |
| HFO | Hartree-Fock Orbital |
| ALOS | Advanced Land Observation Satellite |
| CSA | Canadian Standards Authority |
| NTEF | Near Total External Fluorescence |
| ACA | American Crystallographic Association |
| BGS | Below Ground Surface |
| AESA | Association Of Environmental Scientists And Administrators |
| EAM | Embedded Atom Method |
| OECA | Office Of Enforcement And Compliance Assurance |
| MLSCN | Molecular Libraries Screening Centers Network |