When people talk about file compression, they usually mean ZIP. In fact, they often make it into a verb–much like we “Google” things on the Internet, we “zip” files before sending them over email. But ...

Need to send someone a big batch of files? Don’t attach one after another after another to your e-mail. Instead, compress the files into one smaller, easier-to-manage file. In other words, “Zip” them.

To unzip a file, you can use tools that come pre-installed on your device. You can unzip ZIP files on both computers and smartphones, since they're one of the most common file types. Once you've ...