-
Visicalc
The initial creation of visicalc happened at this time. -
Legal Battles
Visicalc enters legal battles with the Lotus Development corporation, losing their battle in 1983. -
Visicalc Discontinues
Lotus acquires Visicorp/SoftArts and Visicalc is discontinued, with Lotus 1-2-3 now becoming the major spreadsheet software. -
Microsoft Excel
Although developed in 1984-85, microsoft excel took off in around 1987 and became Microsoft's flagship product and the definitive industry standard in spreadsheet software. -
Lotus Discontinues
Lotus is finally acquired by IBM and excel becomes the leader in market share (with Lotus-1-2-3 becoming one of the most sold pieces of software of all time).