Old School Fonts
The original iPod uses the Chicago font, a bitmap font made specifically for the Mac and used in the original Mac OS UI (Menus, buttons). It was designed to maximize readability on low-res bitmap-bases screens.
Espy Sans is another Apple font that was to be used in the UI of the default of theme/appearance that was part of the ill-fated Copland project.
Mac OS 8 ended up using Charcoal, originally called Truth, which looked more like a modern Chicago than the short and stout Espy.