What are Input devices for PDAs, Smart Phones and Tablet PCs

What are Input devices for PDAs, Smart Phones and Tablet PCs ?

Ans. A Primary Input device for a PDA is a basic stylus. Some PDAs have a built in keyboard or support voice input. You can attach a full sized portable keyboard to a PDA. Smart phones include PDA capabilities; input  devices used with PDAs usually are available for smart phones. The Primary input for a Tablet PC is a digital pen, with which you can write on the device screen.