When you click on the button, several results are possible.
You will be able to print the document from Microsoft Word or Excel (described below), or You will be able to print the document from Adobe Acrobat Reader, or You will be able to print the document from your browser window.
If the original file is in MS Word format (for instance the flow charts under extras) and you have Microsoft Word on your computer, it will open the file in a new window. You can then click the print icon.
You can also follow the menu path File>Save as and save the whole document on your hard drive so that you can reprint the file later without accessing the internet.
If the original file is in MS Excel format, it will respond in the same way as MS Word.