Input and Output Devices Kristy Scholler

A computer, the system, has an input and an output. The input gives data to the computer, it processes and/or modifies it and produces an output.

Output Devices

Output devices give data to the user, they let the computer communicate with the user.
Output Devices include: Monitors, Printers, Speakers, Lights, Projectors, Motors

Input devices

Input Devices get data into the computer
Input Devices include: Keyboards, Mouse, Remote Controls, Light Pens, Web Cams, Microphone

Mobile Phone Peripherals

Mobile phone peripherals include: Headphones, Speakers, Fitness Watch/ Accessories, Heart rate monitors

Input and Output devices

Some devices are both input and output devices, for example, a touch screen on a phone or tablet.
Touch screens on phones and tablets are both input and output devices as you are able to touch the screen to put information in and the screen will react in the way it is meant to, to communicate with the user and produce an output.

Optical Mark Readers (OMR)

Optical Character Recognition (OCR)

OCR technology can also be used as an app to recognize words on pictures that you may have have taken of letters or book pages

Barcode Scanners

Bar codes are used to keep track of the things you sell and to keep track of when you need to restock certain items, so they are available for customers if they want to buy it.

Because bar code technology is so accurate, staff will be able to tell what stock they have and if anything is missing or has been stolen.

The main types of bar code scanners are:

Pen-type reader: has a light source at the tip of a pen, or pen shaped scanner
Laser Scanner: Works similarly to a pen-type reader, but uses a laser beam instead.
Camera-based Reader: an app that uses bar code recognition by using camera and image processing techniques.
CCD Reader: has several light sensors to be able to scan bar codes.
Omni-Directional Bar code Scanner: Has highly advanced and is very efficient in decoding badly printed, crumpled and even torn bar codes

There are two main bar code types, linear and 2D. Linear bar codes are made up of linear lines and a 12 digit number. The first 6 numbers is the manufacturer's identification number, the next five represent the item number. The last number is a check digit, which lets the scanner know if the item has been scanned correctly or not. They usually hold information such as text.

Linear Barcode

A 2D bar code is more complex. It can include information such as price, quantity, web address or image. A linear bar code scanner can't read a 2D bar code so an image scanner is used to scan these.

2D barcode

By Kristy Scholler

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Created with images by Pixies - "technology keyboard computing"

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