Blackboard bold <math>\mathbb{D}</math>, representing the unit disk in the complex plane, or the decimal fractions (see number)

D, in calendars an abbreviation for the month December

D, Germany (Deutschland) in international licence plate codes

Substance D, a fictional recreational drug in the novel and film A Scanner Darkly

D, a standard size dry cell battery in electronics

D, a below average grade in education

D and d, the derivative operators

D, in American politics, often used as an abbreviation for a Democrat

D, the number five hundred in Roman numerals

Vitamin D

D, a shorthand for The Wall Street Journal's

d, the recommended symbol for: thickness, diameter, relative density (mechanics), lattice plane spacing (solid state physics), and degeneracy of vibrational mode, in molecular spectroscopy

D, often used as a digit meaning thirteen in hexadecimal and other positional numeral systems with a radix of 14 or greater

D, standing for demand in economics

d, the symbol for day in metrology

D, the symbol of deuterium, an isotope of hydrogen, in chemistry

d, the symbol of the deuteron in particle physics

"The D", one of the names of comedy rock band Tenacious D

Initial D, a Japanese manga and anime about mountain drifting that has spawned several arcade and console games

Count D, a character in the anime/manga series Pet Shop of Horrors

d, used in role-playing games to denote the number of sides of dice

D/, used to denote the dominant person in a BSDM relation

D (drive), the forward cruising gears in an automatic transmission

"d:" or "d:?", often used to refer to the Christian rock band Delirious?

D (programming language), created by Walter Bright as a successor to C++

D functional programming language, a Haskell-like language, with type classes

D, the name of mesons containing charm quarks in particle physics

D, a February 16 through 29 discovery in the provisional designation of a comet or asteroid

The middle initial "D" in the manga and anime One Piece, indicating people with a sort of connection

Vampire Hunter D, the title character in a series of novels by Hideyuki Kikuchi

The Data Language, an MS-DOS 4GL

The D minor scale or chord

The D major scale or chord

d, an abbreviation in British currency (from the Latin denarius) for the pre-decimalization penny, worth 1/240th of a pound

d, the symbol for the total differential operator (partial differentials use ∂)

D, a brassiere cup size

D (Japanese band), a Japanese visual kei band

D, a security division ("Minimal Protection") in the TCSEC

In solid state physics:

"D!" or "Dee!", names of Detlef Soost, a German dancer and choreographer

D, the symbol for aspartic acid in biochemistry

D (video game), a game released in the mid-1990s for the 3DO, PlayStation and Sega Saturn

D programming language (Sun), designed to be used with the DTrace dynamic tracing framework

D as a function of energy, D(E), or wavenumber, D(k), a symbol for the density of states

D, one of the characters in Trace Memory

Haplogroup D (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup

D (data language specification), the basis for Tutorial D and others

<math>\mathbf{D}</math>, the recommended symbol for electric displacement field

d (deci), the SI prefix meaning one tenth, 10^-1

D, denoting the Federal Reserve Bank of Cleveland in the serial numbers of United States dollars

D Magazine, a magazine for the city of Dallas, Texas

In radio, the NATO D band, ranging from 1 to 2 GHz

D (film), a 2005 Bollywood film

D, often used in sports as an abbreviation for defence

D, the recommended symbol for the Debye-Waller factor

D, the symbol for debye, a unit of electrical dipole moment

D, the bass player for Australian band Testeagles

D, the recommended symbol for diffusion coefficient in molecular physics

D, the New York Stock Exchange ticker symbol for Dominion

The prefix "D." to a piece of music by Franz Schubert, indicating its number in the catalogue of Otto Deutsch

D (musical note)

Filetab-D, a language based on decision tables

Haplogroup D (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup

D (album), a 2004 album by Japanese hard rock artist Des-ROW

D layer, part of the ionosphere in earth science

Dialog Manager programming language

D is the fourth letter of the Latin alphabet. It can also refer to the following:

D (New York City Subway service), a service on the New York City Subway

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