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By Krystin Mendoza Communication 165. What is an input? Input is data or instructions that the computer uses! –When you use word processing, save your.

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Presentation on theme: "By Krystin Mendoza Communication 165. What is an input? Input is data or instructions that the computer uses! –When you use word processing, save your."— Presentation transcript:

1 By Krystin Mendoza Communication 165

2 What is an input? Input is data or instructions that the computer uses! –When you use word processing, save your work, or print a page your inputting. Types of Input devices: –Keyboards –Pointing devices –Scanning Devices –Character & Mark Recognition Devices –Image Capture Devices –Audio-input Devices

3 Keyboards one of the most common ways to input data Keyboards translate numbers, letters and special characters. There are 3 types of keyboards 1.Traditional keyboard 2.Folding keyboards 3.Ergonomic keyboard

4 Pointing devices Mouse –Mechanical Mouse –Optical mouse –Cordless/wireless mouse Joystick Touch Screen Light Pen

5 Scanning Devices Optical Scanners 1. Flatbed scanner – much like a copy machine 2. Portable scanner – handheld device that slides across images. Bar Code Readers – ex. Grocery store scanners Character & Mark Recognition devices – scanners that are able to recognize special characters and marks.

6 Image Capturing Devices Optical scanners like traditional copy machines can make a copy from an original. Digital Cameras Similar to traditional cameras except that images are recorded digitally on a disk or in the camera’s memory rather than on film Digital video Cameras

7 Digitizing Devices Digitizing devices convert a sketch or figure into a form that can be processed by a computer. Graphic tablets These record sketches and tracings of maps and other drawings. Digital notebooks These record handwritten notes (typically a notepad positioned on top of an electronic pad or tablet).

8 Audio-Input Devices Audio-Input devices convert sounds for processing. Voice recognition systems - These use a microphone, sound card, and special software. They allow users to operate computers and to create documents using voice commands. Discrete-speech recognition systems - These are able to recognize individual words based on their sound. Continuous-speech recognition systems - These are able to distinguish between same-sounding words by evaluating the context within which individual words are used.

9 What is Output? Output is processed data or information. Output devices provide output for people by translating what the computer has processed into a form that people can use and understand. Output devices are any hardware used to provide or to create output from the computer.

10 Monitor The most frequently used output device. 2 important characteristics of monitors: 1. Size Size is indicated by the diagonal length of its viewing area. 2. Clarity Clarity is indicated by its resolution Types of Monitors Cathode-ray tube (CRT) Flat-panel monitors/Liquid crystal display (LCD) Other Monitors: E-books Data Projectors High-definition television (HDTV)

11 Printers Ink-Jet printer The ink printers spray small droplets of ink at high speed onto the surface of the paper. Laser Printer The laser printer uses a technology similar to that used in a photocopying machine. Thermal Printer Uses heat elements to produce images on heat-sensitive paper. Other Printers Include; Dot-matrix printers – Dot-matrix printers – not high quality and pretty loud Chain printers Chain printers – used in organizations for larger printing loads Plotters Plotters – special purpose printers for producing maps, images, and architectural drawings.

12 Audio – Output Devices Audio-output devices translate audio information from the computer into sounds that people can recognize and understand. Most widely used audio-output devices are speakers and headphones.

13 Combination Input and Output Devices Some examples of combination devices are; Fax machines Fax machines –send and receive images over telephone lines(just incase you didn’t know). Multifunctional devices Multifunctional devices – typically combine scanners, printers, fax, and copying machine. Internet telephony Internet telephony – uses the internet instead of a telephone to connect 2 or more people by phone. Terminal Terminal – connects you to a mainframe or other type of computer called a host computer/server.


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