| Acronym | Meaning |
| NDB | Nondefective Bonding |
| IBR | Infectious Bovine Rhinotracheitis |
| USTR | US Transuranium Registry |
| HSK | Hylleraas Scherr Knight (variational Perturbation Procedure) |
| RDX | Royal Demolition Explosive |
| AMV | Alfalfa Mosaic Virus |
| GAR | Grain Aspect Ratio |
| TDI | Toluene Diisocyanate [mixt. Of Isomers] |
| HQM | Hemiquantal Mechanics (in Mol. Calcns.) |
| AP | Appearance Potential |