An object-orientedConCurrentconstraint language from the University of Saarbrucken. Oz is based on {constraint communication}, a new form of {asynchronous} communication using logic variables. Partial information about the values of variables is imposed ConCurrently and incrementally. Supports higher order programming and object-orientation including multiple inheritance. . ["Object-Oriented ConCurrent Constraint Programming in Oz", G. Smolka et al].