BIW

BIW may refer to:


 * Body in white (BiW), a stage in automotive design
 * biw, ISO 639 language code for the Kol language (Cameroon)
 * BIW, rail station code for Biggleswade railway station, Biggleswade, Bedfordshire, England, UK
 * Bürger in Wut ("Citizens in Rage"), a German political party
 * Business is War, a type of Business war games
 * Bath Iron Works, a shipyard in Maine, US
 * Beloit Iron Works (later Beloit Corporation), a former manufacturing company in Beloit, Wisconsin, US
 * Brillion Iron Works, a former manufacturing company in Brillion, Wisconsin, US
 * BIW Technologies, a former British software company, now part of Oracle