One of my college friends suprised me by "saving" a paper she was working on in vi by typing ':wq' and then typing 'vi <paper>' at the command line. Turns out

One of my college friends suprised me by "saving" a paper she was working on in vi by typing ':wq' and then typing 'vi <paper>' at the command line. Turns out she thought that ':wq' was how you saved in vi, and was happy when I told her to try typing just ':w' instead.