What is a keyboard used for?

What is a Numeric Keypad used for?

What is a mouse used for?

What is a touch pad used for?

What is a tracker ball used for?

What is a remote control used for?

What is a joystick used for?

What is a touch screen used for?

What is a magnetic stripe reader used for?

What is a chip reader used for?

What is a pin pad used for?

What is a scanner used for?

What is a digital camera used for?

What is a microphone used for?

What are sensors used for?

What are graphics tablets used for?

What is an MICR?

What is an OMR?

What is an OCR?

What is a barcode reader?

What is a video camera?

What is a webcam?

What is a light pen?