The Free On-line Dictionary of Computing (30 December 2018):

Microsoft Excel
Excel

    A spreadsheet program from Microsoft, part of their
   Microsoft Office suite of productivity tools for Microsoft
   Windows and Macintosh.  Excel is probably the most widely
   used spreadsheet in the world.

   (http://microsoft.com/msexcel/).

   [Feature summary?  History?]

   (1997-01-14)