Open one of your existing word processing documents and save it as a text file. What difference has this made to the file size? Double-click the text file to open it. Which application has opened it?...

Open one of your existing word processing documents and save it as a text file. What difference has this made to the file size? Double-click the text file to open it. Which application has opened it? How is the appearance of the contents different to the original file?