Save and Save As
After selecting Save from the menu bar or the Standard toolbar, the Save As dialog box appears.
If you do not choose a file name, Word will assign a file name for you. It assigns the first line of text in your document unless you give it a different name when prompted in the File name box.
If you do not specify a file location, Office uses the My Documents folder as the default location. If you can't find a file, check My Documents.