Abstract: A user interface for an audio book player is provided. The user interface includes a number of primary keys for accessing primary functions of the player, the primary keys disposed in a primary zone of a top surface of the player, a number of secondary keys for accessing secondary functions of the player, the secondary keys disposed in a secondary zone of the top surface, and a tactile separation element separating the primary zone from the secondary zone. Each of the primary and secondary keys may have a specific tactilely-recognizable shape and label associated with it.

Abstract: A cartridge for use by print-disabled users to play digital audio content and a player having a receptacle for receiving the cartridge are provided. The cartridge includes a random-access digital storage device storing the digital audio content and having a connector providing access to the digital audio content; and a casing permanently housing the digital storage device and allowing access to the connector of the digital storage device. The casing has a form facilitating handling of the cartridge by the print-disabled users which includes bevelled edges, and has dimensions comparable to dimensions of a standard compact audio cassette. Preferably, the cartridge has a hole extending through the casing at its back end and a sloped surface on the bottom side of the casing at the back end. The receptacle has a form and shape facilitating insertion of the cartridge therein. It has a lower surface defining an elevated ramp along which the cartridge slides as it is inserted into the player.