Visicalc

Visicalc, written by Dan Bricklin and Bob Frankston was released in 1979 for the Apple ][. It was ported to the IBM PC at introduction, and you may use the first PC version here by clicking in the virtual monitor. We are emulating an IBM PC with 64KB of memory.

Thanks to Jeff Parson PCJS.org for the emulator and Dan Bricklin DanBricklin.com for a copy of VisiCalc.

The "Pocket Reference Guide" from the Manual should be enough to get you started!