A family of Microsoft word processing software products for creating web, email, and print documents.
What you are seeing is something like this:
This Open screen shows Recent Documents by default; the list on the left is also of recent documents. The other places I guess will vary depending on where you have Word documents stored. I have all my documents stored in subfolders of the Word Documents folder I have created as a subfolder of the My Documents folder.
If you find this confusing (as I would), you can add the Open command to your Quick Access Toolbar. This will give you the classic Open dialog, which by default opens to the folder you have designated as the default folder for Word documents. It is a standard Windows Explorer dialog, so it is easy to navigate: