Raytheon sold it to the Canadian as CAATS. It was 11 years delayed.
It managed to complete, only when the Canadian government sacked the department in 1996 and dumped the whole ATC business everything on NavCan.
NavCan actually took the final system delivered by RTN, and re-worked it to made it usable eventually. They might know the system better than RTN.
CAATS was actually developed by the Richmond branch of RTN/Hughes in Canada, there are numbers of HK migrants worked in that development team now backed in HK working in the airport area.