Editing Calculator (section)

===1970s to mid-1980s===
<!-- Deleted image removed: [[File:Casio as-a ckt1 1c.jpg|thumb|Internal circuit with twelve Nixie tube display elements inside a 1960s desktop calculator]] -->
The electronic calculators of the mid-1960s were large and heavy desktop machines due to their use of hundreds of [[transistor]]s on several circuit boards with a large power consumption that required an AC power supply. There were great efforts to put the logic required for a calculator into fewer and fewer [[integrated circuit]]s (chips) and calculator electronics was one of the leading edges of [[semiconductor]] development. U.S. semiconductor manufacturers led the world in [[Integrated circuit#SSI, MSI and LSI|large scale integration]] (LSI) semiconductor development, squeezing more and more functions into individual integrated circuits. This led to alliances between Japanese calculator manufacturers and U.S. semiconductor companies: [[Canon Inc.]] with [[Texas Instruments]], [[Hayakawa Electric]] (later renamed [[Sharp Corporation]]) with North-American Rockwell Microelectronics (later renamed [[Rockwell International]]), [[Busicom]] with [[Mostek]] and [[Intel]], and [[General Instrument]] with [[Sanyo]].