Send the following on WhatsApp
Continue to ChatOpen XML Overwhelmingly Approved as an ISO / IEC standard (IS 29500): the end of the file formats war https://peterdehaas.net/2008/04/open-xml-overwh.html
Open XML Overwhelmingly Approved as an ISO / IEC standard (IS 29500): the end of the file formats war https://peterdehaas.net/2008/04/open-xml-overwh.html