UNIT - I BASIC STRUCTURE OF COMPUTERS FUNCTIONAL UNITS A computer consists of five functionally independent main parts. They are‚ ➢ Input ➢ Memory ➢ Arithmetic and logic ➢ Output ➢ Control unit Basic functional units of a computer [pic] The operation of a computer can be summarized as follows The computer accepts programs and the data through an input and stores them in the memory.The stored data
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Computer Systems A Programmer’s Perspective This page intentionally left blank Computer Systems A Programmer’s Perspective Randal E. Bryant Carnegie Mellon University David R. O’Hallaron Carnegie Mellon University and Intel Labs Prentice Hall Boston Columbus Indianapolis New York San Francisco Upper Saddle River Amsterdam Cape Town Dubai London Madrid Milan Munich Paris Montreal Toronto Delhi Mexico City Sao Paulo Sydney Hong Kong Seoul Singapore Taipei Tokyo Editorial Director:
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Computer is a processing machine which processes raw data to produce meaningful data. It has tremendous change with comparison to calculator. Characteristics of Computers: - Computers have got their importance due to the following characteristics: - 1. Accuracy: - Computer performs every operation with equal and high accuracy. Errors can occur in a computer due to only human mistakes‚ weaknesses and imprecise thinking. 2. Repeatitiveness: - Once the set of instructions are permanently
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Uses of Computers in different Fields Our daily encounters with and dependence upon technology is almost invisible as it takes the shape of electronic climate control system‚ wireless communication systems such as phones and pagers‚ automatic tellers to dispense money. Magnetically striped cards to facilitate consumer transactions‚ cable and satellite television‚ auto mobiles and mass transit. Free trade agreements have led to globalization of commerce and scientific debate about global
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Computer Fundamentals Computer is an electronic device that manipulates data according to set of instructions and produce a meaningful result. • Computers are not very intelligent devices‚ but they handle instructions flawlessly and fast. • They must follow explicit directions from both user and computer programmer. • Computers are really nothing more than a very powerful calculator with some great accessories. • Applications like word processing and games are just a very
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HISTORY OF COMPUTERS Historical records will tell us that man has invented three types of devices to assist him in calculating and processing data. These devices could be classified into: a) Manual-mechanical b) Electromechanical c) Electronic 2000 BC - MECHANICAL COMPUTER THE ABACUS * Computations are done by sliding beads on a wire arranged on a tray. Came from the Greek word abax meaning flat surface John Napier(1617) – Logs and Bones * a Scotsman‚ invented
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EVOUTION OF COMPUTERS The evolution of electronic computers over a period of time can be traced effectively dividing this period into various generations. Each generation is characterized by a major technological development that fundamentally changed the way computers operated. These helped to develop smaller‚ cheaper‚ powerful‚ efficient and reliable devices. Today‚ life has become indispensable without a computer. You find computerization in almost every sphere and industry. Computer evolution
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Computer Languages By Nicholas Soer Differences in computer languages is a topic that many people are not familiar with. I was one of those kinds of people before I started researching on this topic. There many different computer languages and each one of them are similar in some ways‚ but are also different in other ways‚ such as: program syntax‚ the format of the language‚ and the limitations of the language. Most computer programmers start programming in languages such as turbo pascal
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KENDRIYA VIDYALAYA SANGATHAN JAMMU REGION . STUDY/SUPPORT MATERIAL 2011-12 CLASS: XII Computer Science ACKNOWLEDGEMENTS Chief Patron Shri Avinash Dikshit Commissioner KVS‚ New Delhi Patron Shri P. K. Koul Assistant Commissioner KVS‚ Jammu Region Guidance
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Computer Systems Individual Computer Systems Designing‚ and Configuring Computer Systems for DIGITEL WORLD Designing Company 1. Understand the function of computer systems. 2. Be able to design computer systems. 3. Be able to build and configure computer systems. 4. Be able to undertake routine maintenance on computer systems. Name: - Kasun NayanaKelum Batch No: - IT K 31 1|Page IT K Batch 31 Computer Systems Individual Acknowledgement I am more grateful to my lecturer Mohamed Shafeer
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