Really slick! Only had to change clear to cls as I have a PC.
s/PC/DOS or Win32 based PC/;
PCs can run many different operating systems, and Windows is just one of them. Unixish operating systems use "clear", DOS (and Win32) systems use "cls", but it can be something completely different. If you want to extend your computer (or PC :) knowledge, or just dislike Windows' instability, try some operating systems, like Linux or FreeBSD. Many are free.