| Acronym | Meaning |
| SEC | Scaled External Correlation (extrapolation Method In CI Calcn.) |
| OEH | One-electron Hamiltonian (quantum Method) |
| ROSH | Registry Of Occupational Safety And Health |
| CCC | Copyright Clearance Center |
| SURF III | Synchrotron UV Radiation Facility (at NIST) |
| TCPTP | T-cell Protein Tyrosine Phosphatase |
| PXR | Parametric X-ray |
| ROM | Read Only Memory |
| CPT | Cluster Perturbation Theory |
| DMAD | Dimethyl Acetylenedicarboxylate |