Excel, which everyone can't live without in their daily work, is actually a killer application VisiCalc on Apple II computer, which was born out of 1979. 1982, the former employees of VisiCalc went to Lotus Software and launched Lotus 1-2-3 on the IBM computer platform. 1993 launches the fifth edition of Excel on the Windows platform. Since 1995, due to the strength of Microsoft in the enterprise market, there is no fourth form of application that can replace Excel.