Mostek MK6010 The Mostek MK6010 was the first calculator chip introduced in 1971. It integrates 360 logic gates, 160 flip-flops made up with 2100 transistors. The IC is mounted on a small piece of circuit board which plugs sideways into the black socket. The circuit is also marked with the NCM (Nippon Calculating Machines) logo, the parent company of Busicom, as the circuit has been used in the Busicom Junior/NCR 18-16, a desktop calculator.