Walkman: listen to music on the move, with the help of headphones iPhone: Responsive finger touch + internet surfing iPod: Click wheel + ability to purchase and download individual song from any vendor Blackberry: QWERTY keyboard, side scroll wheel & trackball + email
access Palm Pilot: Stylus based touch screen + PDA functionality
6 months experience using a handheld device (e.g., mobile phone, LRT gun,
palm pilot, tablet, iPod) to enter,
access, and output information.