Some nifty tunes made by others utilizing computer operating system sounds:

Mac OS X:

You can download the original GarageBand file and .m4a file at The Cleverist.

via swissmiss.

Windows 98/XP:

Despite being a ‘Mac’ guy, I actually like the tune composed using the Microsoft Windows sounds. There’s a little more depth to the tune. As a note of interest: Brian Eno composed the ubiquitous Windows 95 startup sound.