the information on the bar codes transmits to the Computer for further processing. The system gives fast and error free entry of information into the computer. QR (Quick response) Code: The QR code is the two dimension bar code which can be read by a camera and processed to interpert the image. ( ) Voice Input Systems: Microphone serves as a voice Input device.
It captures the voice data and send it to the Computer. Using the microphone along with speech recognition software can offer a completely Figure . Optical Character Reader Figure . Bar code Reader Figure .
Voice input System new approach to input information into the Computer. ( ) Digital Camera: It captures images / videos directly in the digital form. It uses a CCD (Charge Coupled Device) electronic chip. When light falls on the chip through the lens, it converts light rays into digital format.
( ) Touch Screen: A touch screen is a display device that allows the user to interact with a computer by using the finger. It can be quite useful as an alternative to a mouse or keyboard for navigating a Graphical User Interface (GUI). Touch screens are used on a wide variety of devices such as computers, laptops, monitors, smart phones, tablets, cash registers and information kiosks. Some touch screens use a grid of infrared beams to sense the presence of a finger instead of utilizing touch-sensitive input.
( ) Keyer : A Keyer is a device for signaling by hand, by way of pressing one or more switches. Modern keyers have a large number of switches but not as many as a full size keyboard. Typically, Figure . Digital Camera Figure .
Touch Screen Figure . Keyer Chapter Page - - this number is between and . A keyer differs from a keyboard, which has "no board", but the keys are arranged in a cluster. Output Devices: ( ) Monitor: Monitor is the most commonly used output device to display the information.
It looks like a TV. Pictures on a monitor are formed with picture elements called PIXELS. Monitors may