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Enroute 4 output control center4/4/2024 The five ARTCCs that exceeded this requirement were equipped with the IBM DCC which could drive up to 90 PVDs. The Raytheon CDC could drive a maximum of 60 PVDs. and the Plessey Processed Radar Display System (PRDS) in the U.K. The non-IBM display complex was the Raytheon 730 Computer Display Channel (CDC) in the U.S. The 9020A and 9020D CCCs carried out flight and radar data processing but needed an attached display complex to provide a plan view display (PVD) to the air traffic controllers. All the 9020A CCCs were attached to a non-IBM display complex, while the 9020D CCCs could be attached to either a non-IBM display complex or to the IBM 9020E DCC. There were three operational variants of the 9020 system: 9020A CCC (Central Computer Complex) 9020D CCC and 9020E DCC (Display Channel Complex). This schematic shows the maximum configuration, with the mainframe boxes highlighted in blue. Not all FAA ARTCCs (Air Route Traffic Control Centers), of which there were 20, had the maximum configuration. : 4–5 A maximum configuration CCC/DCC complex contained 12 IBM S/360 mainframes. The IBM 9020A, for example, was based on the S/360-50 and the 9020D used two out of three or four S/360-65 processors for flight and radar data processing with two out of three S/360-50 processors providing input/output capability. CAA also installed a system in its London centre. Systems were installed in the FAA's 20 en route Air Route Traffic Control Centers (ARTCCs), beginning in the late 1960s. The IBM 9020 was an IBM System/360 computer adapted into a multiprocessor system for use by the U.S. Model of IBM mainframe specially designed for use in air traffic control
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