DOCX was introduced with Microsoft Word 2007, it's based on open XML and uses ZIP compression for smaller file sizes. The benefit of having open XML is that it is able to be read by applications, platforms and Internet Platforms. However to open it using any Microsoft Word that predated 2007 would require DOCX to be converted into a normal doc format.
DOCX improves file and data management and data recovery. DOCX extends what is possible with the binary files of earlier versions. Any application that supports XML can access and work with data in the new file format. The application does not need to be a Microsoft product it can be any application. Users can also use standard transformations to extract or repurpose the data. In addition, security concerns are drastically reduced because the information is stored in XML, which is essentially plain text. Thus, the data can pass through corporate firewalls without hindrance.
Microsoft Word 2007 Microsoft Word 2008 (MAC) OxygenOffice Professional (Linux) Word 2010
Web pages are predominately marked up in HTML, these are then displayed through browsers such as Safari, Internet Explorer or Mozilla Firefox. It provides a means to describe the structure of text-based information in a document by denoting certain text as headings, paragraphs, links etc and to supplement that text with interactive forms, embedded images, and other objects. HTML source code is used by the Web browser and typically not seen by the user. The RAW HTML can be viewed by choosing View Source from the Web browsers view menu or by opening the HTML file in a text editor.
Any Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)