| Acronym | Meaning |
| DHF | Decoupled Hartree-Fock |
| CNDO/FK | Complete Neglect Of Differential Overlap/ Fischer-Kollmar |
| CNC | Condensation Nucleus Counter |
| IP | Inhalable Particle |
| FEM | Field-Electron Microscopy |
| GAO | General Accounting Office |
| SSR | Simple Sequence Repeat |
| HCL | Hollow Cathode Lamp |
| DRIFT | Diffuse Reflectance IR Fourier Transform |
| PICA | Picosecond Imaging Circuit Analysis |