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    • 1972

    Developed in 1972, the HP-35 was Hewlett Packard's first pocket calculator and the first pocket calculator ever to have transcendental functions. Twenty HP engineers spent two years and approximately $1 million…

    • circa 1978

    From 1968 to 1978, TEAL (Tokyo Electron Applications Laboratory) manufactured calculators under its own name and for other brands. The Photon was introduced in 1978.

    • Undated

    Control Company introduced the first metric conversion calculator in 1978.

    • circa 1979

    Promotional branded items bearing the Beckman Instruments, Inc. name, including calculators, tennis balls, screwdriver, and highlighter.