Avro Canada
CF-100 and CF-105 were Avro Canada company designations that preceded similar RCAF designations that became the basis for the Canadian Forces designations instituted in February 1968. Unlike the US designation system, there is only a single sequence rather than separate sequences for each role, and numbering started at 100, prefixed with C (for Canada) and a role letter or letters. According to R. W. Walker. 102 and 103 were not used in the CF system to avoid confusion with Avro's use of those numbers for the cancelled Avro Canada C-102 Jetliner and the Avro Canada CF-103 interceptor project.