Introduction - WhatIsaComputer? How is a computer defined?...

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How is a computer defined? What Is a Computer? Produces and stores results Electronic machine which accepts data as input, processes it and gives information as output. Information Information Data that is organized, meaningful, and useful Data Data Raw facts, figures, and symbols
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Computer Applications in Society What are some examples of computer applications in society? Education Finance Government Healthcare Science Publishing Travel Industry
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Characteristics of Computer Speed Accuracy Reliability Diligence Storage Versatility Power of Remembering No I.Q. No Feeling Communications
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Components of a Computer System
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Input Devices Accept external data or commands Input Processing Output Secondary Storage Send data or  Send data or  commands to the  commands to the  processor   processor  
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Processing Unit Also known as the Central Processing Unit (CPU) Executes computer instructions Input Processing Output Secondary Storage Manipulates input data  Manipulates input data  into information  into information  people want people want
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Output Devices Show people the processed data in understandable terminology Input Processing Output Secondary Storage
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Storage Secondary storage devices such as disks store data and programs Input Processing Output Secondary Storage Primary storage (or  Primary storage (or  memory) holds  memory) holds  programs and data  programs and data  temporarily temporarily
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This note was uploaded on 10/22/2011 for the course ECONOMICS 105 taught by Professor Ak during the Spring '11 term at Punjab Engineering College.

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Introduction - WhatIsaComputer? How is a computer defined?...

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