Sub is a common abbreviation of words beginning with the prefix "sub-". Sub or SUB or variant, may also refer to Places Juanda International Airport, Surabaya, Indonesia, IATA code SUB People Bottom (BDSM), or "sub" for "submissive" Substitute teacher Computing and technology <sub>, an HTML tag for subscript SUB 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 (film), a 2018 German film Other uses Seafarers' Union of Burma, or SUB Submarine sandwich, or hero sandwich Submarine boat Submersible boat Subscription See also Semisub Süß Substitute (disambiguation) Submarine (disambiguation)