PDQ

PDQ is a TLA (three-letter acronym) which may refer to:
 * pretty damn quick
 * P. D. Q. Bach, fictional composer, imaginary son of Johann Sebastian Bach, invented by musical satirist "Professor" Peter Schickele.
 * PDQ Food Stores, a convenience store chain in the American Midwest
 * Physician Data Query, an online database developed by the National Cancer Institute
 * The Prose Descriptive Qualities role-playing game engine designed by Atomic Sock Monkey Press, used in games such as Truth & Justice and Ninja Burger
 * In the United Kingdom, credit card and debit card terminals are known as Process Data Quickly machines
 * "Product Data Quality", a term developed by UDEX to describe the level of accuracy, completeness and consistency of a product's data as used in a supply chain management system by retail trading partners
 * PDQ (game show), an American television game show which aired from 1966 to 1969.
 * PDQ Manufacturing, a car wash manufacturer of both touch free (brushless) and friction (brush) equipment.
 * PDQ (Pretty Damn Quick) computer performance analysis software developed by Neil J. Gunther.