INPUT

INPUTDONE BY: OLIVER FAIRCLOURH

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What is input?

Categories of Input

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INPUT

• Input is the process of entering data, commands and instructions into a computer system for processing. This is done by the use of input devices.

• An input device is a computer hardware that allows data to be input in a computer system.

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CATEGORIES OF INPUT

INPUT CAN BE PLACED IN FOUR BASIC CATEGORIES, NAMELY:

1. KEYBOARD ENTRY DEVICES

2. POINTING DEVICES

3. SOURCE DATA ENTRY DEVICES

4. MULTIMEDIA INPUT DEVICES

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KEYBOARD ENTRY DEVICE

This is the most important input device. This device is mainly used for typing, performing calculation on a computer or playing games.

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POINTING DEVICES

• This type of input is mainly used to move a pointer (cursor) on a screen. Pointing devices may also be used to select, drag, or double-click things.

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• Trackball Touchpad

Light pen Touchscreen

Joystick

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SOURCE DATA ENTRY DEVICESThese devices are used to collect data at the

source and send it directly to the computer,

thus eliminating the possibility human errors in

data entry. These devices include: Optical

Character Reader OCR, Barcode Reader,

Magnetic Ink Character Reader (MICR),

Optical Mark Reader, Scanner.

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Examples of Source Data Entry Devices

OMR MICR

Scanner Barcode Reader

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http://www.google.com.jm/url?sa=i&rct=j&q=&esrc=s&frm=1&source=images&cd=&cad=rja&docid=QhNvDQCvFF047M&tbnid=cfX6NSS8sbAfzM:&ved=0CAUQjRw&url=http://en.wikipedia.org/wiki/Barcode_reader&ei=Skp9UoK8N8yNkAfd_oDIAw&bvm=bv.56146854,d.eW0&psig=AFQjCNH2Ue0b61d-VtkzFe2RXxn1C-6Z0w&ust=1384029120201107

MULTIMEDIA INPUT DEVICES

Multimedia refers to a mixture of sound, picture, voice and video. Sound Input Devices

digital camera, web cam etc. Voice Input Devices

microphone, digital camera etc. Video Input Devices

web cam, digital camera etc.EXIT

Multimedia Input devices

Digital camera Microphone

Web cam

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POP QUIZ1) WHAT IS INPUT?

a) Process of displaying data

b) Process of storing data

c) Process of entering data and commands in a computer

d) Process of saving data to a computer system

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2. How many categories of Input devices are there?

a) 2b) 3c) 4d) 5

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3. The four categories of input devices are:

a)keyboard entry, pointing devices, source data entry and multimedia input

b) soft copy, hardcopy, plotter, wireless,

c) input, output, processing, storage

d) multimedia input, source data entry, sound input, MICR

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4. What category of input is the computer mouse, trackball, touchpad and joystick under?

a) Keyboard Entryb) Source Data Entryc) Multimedia Inputd) Pointing Devices

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4. What category of input is the Keyboard under?

a) Keyboard Entryb) Source Data Entryc) Multimedia Inputd) Pointing Devices

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5. What category of input does the microphone belong?

a. Keyboard Entryb) Source Data Entryc) Multimedia Inputd) Pointing Devices

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6. To what category of input does the scanner belong?

a. Keyboard Entryb) Source Data Entryc) Multimedia Inputd) Pointing Devices

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THE END

INPUT

Documents

optical mark reader

optical character reader

following optionswhat

possibility human errors

oliver fairclourhexitselect

pointer cursor