Microsoft’s dominance of office suites was no foregone conclusion. It was not the leader in any office category originally, or for many years. The first personal computers in business were the CP/M-based machines of the 1970s. Top-selling programs were WordStar, VisiCalc, and dBASE II, offering word processing, spreadsheet, and database functions, respectively. On MS-DOS, WordStar and VisiCalc were replaced by WordPerfect and Lotus 1-2-3, respectively. They were better products.