Science

General Science, Popular Science, Hard Science, Physics, Astronomy, Geology, Chemistry, Ocean Science, Mathematics and Forensic.

D4R

D4R stands for Double-Four-Ring D4R stands for D4 Dopamine Receptor

D5

D5 stands for Trident II Missile D5 stands for 5% Dextrose Solution D5 stands for Diesel Engine, 5 Cylinders (Volvo)

D5S

D5S stands for DeoxIT D5 Spray (electronics cleaning product)

D3D

D3D stands for Direct 3D D3D stands for Display in 3-Dimensions