DOS- I liked the absence of all of the user friendly crap that makes Windows so popular...that, and I am one of few in my area who do know ANYTHING about DOS (There's me, stflook, my friend Ben, and a few others...) I LIKE DOS! Even though it is a Microsoft product!

UNIX - WHO DOESN'T love UNIX?! With the fact that they have had almost 40 years of refinement, it is a well defined, secure system, which ensures the user/admin/network tech not nessesarily ease of use, but the reliability and confidence that NO MICROSOFT PRODUCT CAN EVER DELIVER!

LINUX - with its charming little penguin as a logo, it is one of the easiest unix based operating systems to use on the market in this user's opinion... although it does have a somewhat user friendly interface (as long as you aren't running it as a webserver under Red Hat or other distrabution), that does not take away from the overall power of the operating system with the penguin on the box.
The Three Salute!
The ZIP file contains a sheep screenmate. If you run multiple instances of the sheep, they will bump into each other.