From the 1960s to the 1980s, the National Capital Region had a building boom,  which was followed by large growth in the high-tech industry during the 1990s and 2000s. Ottawa became one of Canada's largest high tech cities and was nicknamed Silicon Valley North. By the 1980s, Bell Northern Research (later Nortel) employed thousands, and large federally assisted research facilities such as the National Research Council contributed to an eventual technology boom. The early adopters led to offshoot companies such as Newbridge Networks, Mitel and Corel.