Sub

Sub or SUB may refer to:

Places

 * Juanda International Airport, Surabaya, Indonesia, IATA code SUB

People

 * Bottom (BDSM), or "sub" for "submissive"
 * Substitute teacher

Computing and technology

 * , an HTML tag for subscript
 * designates a subroutine in some programming languages
 * SUB, substitute character, ASCII character 26
 * SUB, subtraction processor command
 * .sub (disambiguation), several file extensions
 * Subeditor
 * Subwoofer loudspeaker

Typography

 * Subscript and superscript
 * Subtitle

Entertainment and media

 * Sub (TV channel)
 * Sub (album), a 2000 album by Swiss industrial metal band Apollyon Sun
 * The Sub, a 2017 American short horror film
 * Subs (novel), a 2011 novel by Thor Kunkel

Other uses

 * Seafarers' Union of Burma, or SUB
 * Submarine sandwich, or hero sandwich
 * Submarine boat
 * Submersible boat
 * Subscription