Quadra can mean:
Quadra Software solutions Pvt Ltd., ERP Solution For Construction Industries.
Juan Francisco de la Bodega y Quadra, Spanish explorer
Quadra Island, an island in British Columbia, Canada, which is named after the explorer
Quadra, São Paulo, a municipality in Brazil also named after the explorer
Vancouver Quadra, a federal electoral district in British Columbia, Canada
Macintosh Quadra, a line of computers made by Apple Computer
Hiroshi Watanabe a.k.a. QUADRA, Japanese techno musician.
a group of personality types which share the same valued functions in socionics
Quadra , Roman agricultural settlement in quadratic form.
Quadra, a multiplayer Tetris clone featuring recursive gravity.
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Source:
http://en.wikipedia.org/wiki/Quadra