Complex sentence: In 1964 Canon introduced'Canola 130', the first Japanese made 10-key calculator, a substantial improvement on the design of the British Bell Punch company, which introduced the first fully electronic calculator two years earlier with the Sumlock Anita Mark 8 unit.
Split into simpler sentences: In 1964 Canon introduced'Canola 130', the first Japanese made 10-key calculator, is introduced. It was a substantial improvement on the design of the British Bell Punch company, which introduced the first fully electronic calculator two years earlier with the Sumlock Anita Mark 8 unit.