The Sony Reader service and experience crosses many platforms. Application development plays a large part of the product offerings, including Reader for iPhone, Android, Windows, and Mac.
The e-Ink display devices require custom interface design. This design challenge lies somewhere between software front-end development and operating system development.
To compliment the application interfaces, the Sony Reader book store must be available from each device. The ability to search, browse, purchase, and retrieve previous purchases must be made available for users of the e-Ink device, and on the mobile platform as well as the PC platform.