History of the Ipod
Uncharacteristically, Apple did not develop iPod's software entirely in-house, instead using PortalPlayer's reference platform based on 2 ARMcores. The platform had rudimentary software running on a commercial microkernel embedded operating system. PortalPlayer had previously been working on an IBM-branded MP3 player with Bluetoothheadphones Apple contracted another company, Pixo, to help design and implement the user interface under the direct supervision of Steve Jobs. As development progressed, Apple continued to refine the software's look and feel. Starting with the iPod mini, the Chicagofont was replaced with Espy Sans. Later iPods switched fonts again to Podium Sans— a font similar to Apple's corporate font, Myriad. iPods with color displays then adopted some Mac OS Xthemes like Aqua progress bars, and brushed metalin the lock interface. In 2007, Apple modified the iPod interface again with the introduction of the sixth-generation iPod classicand third-generation iPod nanoby changing the font to Helveticaand, in most cases, splitting the screen in half by displaying the menus on the left and album artwork, photos, or videos on the right (whichever was appropriate for the selected item).