By 1982 VisiCalc's price had risen from $100 to $250. Several competitors appeared in the market, notably SuperCalc and Multiplan, each of which added more features and corrected deficiencies in Visicalc. In 1983 Lotus 1-2-3 was launched by a competing software publisher. 1-2-3 was written by a former VisiCalc employee. Unlike the PC version of VisiCalc, 1-2-3 was written to take full advantage of the PC's increased memory, screen and performance. Yet it deliberately attempted to remain as compatible as possible with VisiCalc, including copying its menu structure as far as possible to allow VisiCalc users to easily migrate to 1-2-3. The program was an immediate runaway success, and sales of VisiCalc evaporated almost overnight. 1-2-3 became the corporate spreadsheet of choice and an industry was created of compatible add-on products. But by the year 2000, Lotus 1-2-3s market share had substantially shrunk and today is no longer sold by IBM. Please Google the topic of Lotus 1-2-3 and determine what led to its demise and make some notes so that we can discuss that demise in class.