 One of the earliest influential consumer electronic products enabled by MOS transistors was the electronic pocket calculator.In 1965, the Victor 3900 desktop calculator was the first MOS LSI calculator, with 29 MOS LSI chips.In 1967 the Texas Instruments Cal-Tech was the first prototype electronic handheld calculator, with three MOS LSI chips, and it was later released as the Canon Pocketronic in 1970.