Calling sucros from other sucros In large sucro applications, many sucros are cooperating. Sucros can call other sucros in two different ways. The sucros are either chained or nested. In the former case, one sucro is followed by another and there is no return to the first one (unless the second calls the first again). In the latter case, the second sucro is used as a subroutine and the calling sucro continues again after the second one has terminated normally. 1 = Chaining of sucros 2 = Nesting of sucros (calling another sucro as a subprogram) S = More information on sucros in general