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].