Software Arts VisiCalc (1979-1985) Handheld Computers Sony had to make a

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

was a cornerstone of mid-century home audio and represented the absolute gold standard for tabletop radio performance

Released years before Steve Jobs returned to Apple

To control the volume on this strictly mechanical machine

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

Software Arts VisiCalc (1979-1985) Handheld Computers Sony had to make aVisiCalc 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