D (disambiguation)

D is the fourth letter of the Latin alphabet.

D or d may also refer to:

People with the name

• D, the bass player for Australian band Testeagles
• "D!" or "Dee!", names of Detlef Soost, a German dancer and choreographer

Arts, entertainment, and media

Music

Groups and labels

• D (band), a Japanese rock/metal band
• D Records, a former record label in Houston, Texas, US
• "d:" or "d:?", often used to refer to the Christian rock band Delirious?
• "The D", one of the names of comedy rock band Tenacious D

Periodicals

• D, a weekly supplement to the Italian newspaper la Repubblica
• D Magazine, a magazine for the city of Dallas, Texas, US

Other uses in arts, entertainment, and media

• D (film), a 2005 Bollywood film
• Initial D, a 1995 Japanese manga and anime about mountain drifting that has spawned several arcade and console games
• D, the production code for the 1964 Doctor Who serial Marco Polo

Computing, technology, and engineering

Computing

• .d, a file format used for Agilent MassHunter mass spectrometry software
• .d, a pathname component suffix for a directory; for example with the init program
• -d, a suffix of a daemon, a computer program that runs as a background process
• D - Minimal Protection, a security division in the Trusted Computer System Evaluation Criteria

Mathematics and science

Measurements

• Deci- (d), the SI prefix meaning one tenth

Mathematics

• D, Roman numerals for 500
• D, Thirteen, or D in hexadecimal and other positional numeral systems with a radix of 14 or greater
• D and d, the derivative operators
• d, the symbol for the total differential operator; in a related but more general meaning, it is the exterior derivative operator in differential geometry
• d, often a variable for the diameter of a circle in geometry
• d(n), Divisor function, the number of positive divisors of an integer n
• Blackboard bold ${\displaystyle \mathbb {D} }$, the unit disk in the complex plane, or the decimal fractions; See Number