D. Tax stands for Doctor of Taxation (graduate degree)
D-ZUG stands for Durchgangszug (German no-stop-train)
D-WRON stands for Dynamic Wavelength Routed Optical Network
D-WIP stands for Defense-Wide Intelligence Plan
D-VON stands for D-Von Dudley (pro wrestler)
D-W stands for Durnin-Womersley Equation (fat mass calculation)
D-VCO stands for Differential Voltage-Controlled Oscillator
D-VHS stands for Digital Video Home System
D-VAR stands for Dynamic Volt-Amperes Reactive
D-TTL stands for Digital through the Lens