| Acronym | Meaning |
| DWPE | Distorted-wave (with) Polarization (and) Exchange |
| DWPF | Defense Waste Processing Facility |
| DWPI | Derwent World Patents Index |
| DWPL | Drinking Water Priority List |
| DWPO | Distorted Wave Polarized Orbital |
| DWRD | Drinking Water Research Division (EPA) |
| DWRF | Drinking Water Research Foundation |
| DWS | Debris Washing System |
| DWS | Diffusing-wave Spectroscopy |
| DWS | Drinking Water Standard |
| DWSBA | Distorted Wave Second Born Approxn. |
| DWT | Discrete Wavelet Transform |
| DWTM | Distorted Wave T-matrix (for Electron-atom Scattering) |
| DWTT | Drop-weight Tear Test |
| DWX | Distorted-wave Approxn. With Exchange |
| DXA | Dual-energy X-ray Absorptiometry |
| DXRD | Differential X-ray Diffraction |
| DXRD | Dynamic X-ray Diffraction |
| DXRL | Deep X-ray Lithography |
| DXS | Diffuse X-ray Scattering |
| DYANA | Dynamics Algorithm For NMR Applications |
| DZ | Dunning-Huzinaga (basis Sets) |
| DZ | Double Zeta (basis Set) |
| DZD | (double Zeta)-diffuse (basis Set In Configuration-mixing MO Calcns. On Mols.) |
| DZDP | (double Zeta)-diffuse-polarization (basis Set In Configuration-mixing Mo Calcns. On Mols.) |
| DZHD | Double-zeta Huzinaga-Dunning (wave Functions) |
| DZP | (double Zeta)-polarization Contracted Gaussian Basis Set |
| DZPP | Double-zeta (doubly) Polarized (basis Set) |
| DZRS | Double Zeta Roos-Siegbahn (wave Functions) |
| E-2PH-TDA | Extended Two-particle-hole Tamm-Dancoff Approxn. (green-function Method For Ionization-energy Calcns.) |
| E-CATS | Electronic Catalog System |
| E2PROM | Electrically Erasable Programmable Read Only Memory |
| EA | Environmental Assessment |
| EA | Equilibrated Aggregate (interplanetary Dust Particle) |
| EA-EOMCC | Electron Attachment-equation Of Motion Coupled Cluster |
| EAA | Environmental Assessment Association |
| EAA | Essential Amino Acids |
| EAA | Excitatory Amino Acid |
| EAAPS | Electron-excited Auger-electron Appearance Potential Spectroscopy |
| EAAS | Electrothermal Atomic Absorption Spectrometry |
| EAC | Ehrlich Ascites Carcinoma |
| EAC | Environmental Assisted Cracking |
| EACE | Enzyme Affinity Capillary Electrophoresis |
| EACN | European Air Chemistry Network |
| EACVD | Electron-assisted Chemical Vapor Deposition |
| EAE | Experimental Allergic Encephalomyelitis |
| EAE | Experimental Autoimmune Encephalomyelitis |
| EAEC | Enteroaggregative Escherichia Coli |
| EAES | Electron-excited Auger Electron Spectroscopy |
| EAF | Electric Arc Furnace |