The first killer app was VisiCalc. This early spreadsheet turned the Apple II from a hobbyist toy to a business computer. VisiCalc came with room for improvement, though. In addition, a new architecture and operating system, the Intel-based IBM PC and MS-DOS, also needed a spreadsheet to be taken seriously. That spreadsheet, released in early 1983, would be Lotus 1-2-3, and it would change the world. It became the PC's killer app, and the world would never be the same.
Far faster than its competition, such as SuperCalc and Microsoft's first spreadsheet, MultiPlan, Lotus 1-2-3 would become both IBM's and Microsoft's first killer app. With the opening of the Intel architecture and MS-DOS to IBM PC clones, Lotus 1-2-3 became the essential application for the 1980s PC revolution.
In 2012, IBM started retiring the Lotus brand. Now 1-2-3, the core product that brought Lotus its fame, takes its turn on the chopping block. IBM stated, "Effective on the dates listed below, [June 11, 2013] IBM will withdraw from marketing part numbers from the following product release(s) licensed under the IBM International Program License Agreement:" IBM Lotus 123 Millennium Edition V9.x, IBM Lotus SmartSuite 9.x V9.8.0, and Organizer V6.1.0.
Further, IBM stated, "Customers will no longer be able to receive support for these offerings after September 30, 2014. No service extensions will be offered. There will be no replacement programs."
While Lotus' groupware client program Notes and its server component Domino will live on, IBM will no longer be offering any Lotus-branded programs. As for 1-2-3 itself, 30 years after it helped start the personal computing revolution, this essential PC program will be put out to pasture.