You can use 7zip or winrar for open rar and zip files for free.

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https://www.rarlab.com/download.htm

The Microsoft Office files (doc, docx, xls, xlsx, ppt, pptx, etc.) can be opened with Microsoft Word, PowerPoint, Excel etc. Go to this link to download a 60 day trial version:http://office.microsoft.com/en-us/try/
For problems regarding different versions compatibility go here: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=3It is also a word that is generally used in blame games, phrases such as \"why did you have to do that\' are mostly evident in conversations that has been triggered by an occurrence of an error.
It is therefore an impossible to avoid word by any human being as it applies almost everywhere in our contexts e.g exams, court rooms, investigative sessions, normal conversations and in explanations.