What's the deal with the Applications folder within the User folder?

You should probably open some first to determine whether you want to delete them. Not knowing their contents, I have no idea what they're doing in the user Applications folder.

http://www.tech-pro.net/howto-open-cab-file.html

There's also The Unarchiver, which you can download directly, not just from the App Store.

http://unarchiver.c3.cx/

Paul --

They're files from Word.

If it were my Mac, I'd trash them. Here's what I found on them similar to what WZZZ found for you;

Opening the CAB

You will download a file whose name consists entirely of a number and which has the extension .cab. A .cab is a Microsoft “cabinet” file: essentially it’s a Zipped folder structure with the ability to store longer file names.

Depending on your version of Mac OS, the built-in Zip utility may not be able to open it, but there are programs that can. If you are on a Power PC-version Mac (A G3 or a G4 or a G5...) then Stuffit Expander will do the trick. If you have an Intel-processor Mac, Stuffit has a bug that may prevent it. Only one way to find out...

1. If your browser is correctly set up, it will leave the file in your Downloads folder with a subfolder above it containing the unpacked content.
2. If you can’t find it, start Stuffit and drag the .cab onto it.
3. Stuffit will either issue an error message, or it will leave a folder containing the template in the same folder as the .cab file. If you get an "Error 17540" from Stuffit, that means "Can't understand the format" and the extracted template file will not be useable.

Thanks very much, Paul.

Pages is great. Another alternative, look at OpenOffice. It's free, and it works just as well as Office.

All the best . . .