 After 30 years, the system was still in use by Fujitsu to maintain the ICL operating system.At the end of 1977, Pearson moved to Bell-Northern Research Laboratories in Ottawa, Canada, and became Director of the laboratory's Advanced Development teams in Palo Alto, Raleigh NC and Ottawa.Whilst at BNR his primary focus was on leading research programmes working on heuristic design and development technologies for Northern Telecom digital communications products.