OTB may refer to:

Arts

On the Boards On the Boards (OtB) is a non-profit contemporary performing arts organization in Seattle, Washington, founded in 1978. Originally located at Washington Hall in the Central District, the organization moved in 1998 to their current location in U ...

, an arts organization in Seattle, Washington *

Out of the Blue (American band) Out of the Blue, also known as OTB, was an American jazz ensemble founded by Blue Note Records in the 1980s as a showcase for the label's younger musicians. The group was formed in 1984, releasing four albums and touring extensively over the next f ...

, a jazz ensemble

Computing

* One True Brace, a software coding convention for formatting loops, functions, if statements, and blocks *

Orfeo toolbox In computer science, Orfeo Toolbox (OTB) is a software library for processing images from Earth observation satellites. OTB was initiated by the French space agency (CNES) in 2006. The software is released under a free licence; a number of contri ...

, an open source library for remote sensing image processing *

OTA Bitmap OTA Bitmap was a specification designed by Nokia for black and white images for mobile phones. Introduction The OTA or ''Over The Air'' Bitmap was defined by Nokia Corporation as part of their Smart Messaging Specification, to send pictures as a ...

, an image file specification for mobile phones (*.otb files)

Sports and games

Off-track betting Off-track betting (or OTB; in British English, off-course betting) is sanctioned gambling on horse racing outside a race track. U.S. history Before the 1970s, only the state of Nevada allowed off-track betting. Off-track betting in New York was ...

, sanctioned gambling on horse racing outside a race track * Over-the-board, in chess, played on a single physical chessboard (as opposed to correspondence or online chess) *

Off the ball Off the ball (or OTB) is a term used in football (soccer), football in the United Kingdom, usually associated with a player's action when not in possession of the ball, such as a fight or a late challenge. If a referee does not see an OTB incide ...

, in association football, a player's movement when not in possession of the ball

Other

* Off the boat, a slang phrase for newly arrived immigrants *

Overberg Test Range The Denel Overberg Test Range is a weapons systems testing facility in the Overberg region on the south coast of South Africa, near Arniston, Western Cape. It includes launch pads and tracking systems. It was used to test the RSA series of Is ...

, or ''Overberg Toetsbaan'', a missile test range in South Africa *

Overseas Trust Bank Overseas Trust Bank Limited (OTB) () was a bank in Hong Kong. It was established in 1955 by Chang Ming Thien, a Malaysian businessman and it was listed on the Hong Kong Stock Exchange in 1972. It was the fourth largest bank in Hong Kong before ...

, a defunct bank of Hong Kong *

OTB Group Only The Brave, S.p.A., commonly known as OTB Group, is an Italian holding multinational corporation specializing in luxury goods, headquartered in Breganze. The company was founded in 2002 by Renzo Rosso as a holding company for Diesel and f ...

, a holding company for several fashion brands * '' The Old Timer's Bulletin'' an amateur radio history journal {{disambiguation