 Although Datacom/DC solved virtually all of CICS’s shortcomings and provided high performance, IBM continued to pour massive resources into CICS.VTAM’s introduction in the late 1980s meant that much of Datacom/DC would have to be gutted and rewritten.Rather than pursue this tack, ADR chose to back out of that marketplace and replaced Datacom/DC with CICS Services as the interface between CICS, Datacom and later, IDEAL.