Software Arts VisiCalc (1979-1985) Handheld Computers These early batteries were wrapped

These early batteries were wrapped in simple cardboard jackets and featured an old-school design with a brass plug on top and a zinc metal base

To control the volume on this strictly mechanical machine

Fun Fact: Jay Miner also designed the Atari 400 & 800 computer systems in 1979

it was highly prized for its built-in signal strength and battery meters

Sony had to make a couple of major compromises: it used a basic optical viewfinder (meaning you were looking through actual glass lenses rather than a video screen) and it completely lacked a playback function

Software Arts VisiCalc (1979-1985) Handheld Computers These early batteries were wrappedVisiCalc First Commercially Released Computer Spreadsheet Program VisiCalc, released in October 1979, was the "killer app" that single handedly transformed the personal computer from a hobbyist's toy into an essential business tool. Conceived by Dan Bricklin while watching a Harvard Business School professor laboriously erase and recalculate a financial table on a blackboard, and programmed by Bob Frankston, VisiCalc introduced the world to the