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

Microsoft Word
MS Word
Word

    A popular word processor, part of the
   Microsoft Office suite.  The original Word (versions 1.0 to
   4.?/5.0?) was originally text-based (non-GUI) and ran
   under MS-DOS.  Then Microsoft released Word for Windows
   1.0 and 2.0.  Later they produced new versions for each OS,
   both numbered 6.0.

   (http://microsoft.com/catalog/products/word/).

   [Features?]

   (1997-02-11)