BYTE -- Here's a fun geek trick in OS X. Within the Terminal on your Mac is something called emacs. It's a text editor tool found in most Unix-based systems. Hardcore geeks love it, and you can have some fun with it too. It's easier than you think.
To access the Terminal, go to: Applications>Utilities>Terminal
When the Terminal window pops up, type in the following command:emacs
Then hit Enter. You will see GNU emacs. There, you can see the version number (22.1, highlighted in the image below). Keep that in mind for later.
After that, press [ESC]X.
You'll be prompted to enter an M-x command. You can enter any of the commands shown below.
You can view this list by opening a new terminal window and typing in this command (note the space after “ls”): ls /usr/share/emacs/(version number)/lisp/play
So mine looks like this: ls /usr/share/emacs/22.1/lisp/play