CampusTen & CampusTwelve are outline versions of Apple's "Chicago" bitmap font. In contrast to other implementations, however, these fonts preserve the pixeled square look of the original bitmaps. If set at 12 points, Campus Twelve produces exactly the screen representation and spacing of the original bitmap-only font. Besides being the Mac's System font for years, Chicago has also been used on the iPod.
Below is a picture of the on-screen display of the font.