DCHP-1 Online
O.B.U. 
a labor organization formed at Calgary in 1919 on an industrial rather than a craft basis; also, a member of this organization.
See also: One Big Union
- 1919 At Medicine Hat the Federated Railway Trades have unanimously endorsed the O.B.U.
- 1963 The O.B.U. sought to establish by strike action the right to collective bargaining. . . .
- 1919 At Medicine Hat the Federated Railway Trades have unanimously endorsed the O.B.U.