Please explain.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]

Libre Office is a different program. It has many but not all of the features of Word. For many users it is all they need. (The same can be said of WordPad, which comes with Windows.) It will read and write Word documents. However, Word 2007 will read and write Word documents, but cannot handle features introduced into Word in later versions.