Lotus 1-2-3
Software
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Lotus 1-2-3 is a discontinued spreadsheet program from Lotus Software. It was the first killer application of the IBM PC, was hugely popular in the 1980s, and significantly contributed to the success of IBM PC-compatibles in the business market. Wikipedia
Initial release date: January 26, 1983
Founder: Mitchell Kapor
Developer(s): Lotus Software
Final release: 9.8.2 / 2002; 22 years ago
License: Proprietary
Written in: x86 assembly language, C