| Acronym | Meaning |
| RTD | Resonant Tunneling Diode |
| DWRF | Drinking Water Research Foundation |
| HNSCC | Head And Neck Squamous Cell Carcinoma |
| PHF-OCE | Perturbative Hartree-Fock One-center Expansion |
| CDAF | Continuous Distributed Approximating Function |
| ECDIN | Environmental Chemicals Data And Information Network |
| SMD | Sauter Mean Diameter |
| CATSAT | Cooperative Astrophysics And Technology Satellite |
| OSHRC | Occupational Safety And Health Review Commission |
| ERDEC | U.S. Army Edgewood Research |