of the military and industry in the development of electronics‚ computers‚ and information theory. After the 1940s‚ the military remained the major source of research and development funding for the expansion of automation to replace manpower with machine power. Since the 1950s‚ four generations of computers have evolved. Each generation reflected a change to hardware of decreased size but increased capabilities to control computer operations. The first generation used vacuum tubes‚ the second used
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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 CONCEPTS A computer is a machine that processes data and performs tasks according to a set of instructions. To do anything‚ computer must be give specific directions to follow. They get these directions from software. Software‚ such as that used for word processing‚ is a set of step-by-step instruction for the computer‚ written by computer programmers in a programming language like BASIC‚ Pascal‚ or C. Computers also get instructions from you‚ the user. When you use the mouse (more
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CHAPTER ONE COMPUTER SYSTEM FUNDAMENTALS 1.1 Computer System as a Universal Tool A computer system is an electronic device that accepts inputs; transform the input through some processes to obtain output or information that can aid effective decision making. Information originated from raw data which by its own simple definition is any raw fact or figure that can be subjected to a form of manipulation before it can be trusted for decision making. Data can originate from various sources depending
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Classification of computers Created by: Valuta Iuliana Module: Information and Communication Technology Teacher: Peter Laszlo Created by: Valuta Iuliana Module: Information and Communication Technology Teacher: Peter Laszlo * Table of Contents 1 Types of computers 2 1.1 Microcomputers 3 1.2 Minicomputers 5 1.3 Mainframe computers 5 1.4 Supercomputer 5
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Computer Literacy For over fifty years‚ beginning with the famous ENIAC‚ a revolution has been taking place in the United States and the world. The personal computer has changed the way many people think and live. With its amazing versatility‚ it has found its way into every area of life‚ and knowing how to operate it is a requirement for today’s world. Those who have not taken the time to learn about computers often do not even know what to do once one has been turned on‚ and this problem
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Few industries have changed so much in such a short time as the computer industry‚ and the pace of change shows no sign of slowing. The computer now has a role in almost every aspect of modern life‚ and it has radically affected the way people work‚ play‚ study and organize their lives. As we enter the 21st century‚ computers are influencing ways of teaching and learning‚ as access to computers in schools is becoming more widespread and varied. Their use enables the learner to develop at his or
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Computer Maintenance Guide Do you get days where you feel like tearing your hair out‚ because your Pc will not operate in the manner which it did when you first bought it. Believe me you are not alone‚ this happens to most of us‚ especially if your Pc is a few years old and you have not given it the maintenance it requires. Pcs need to be kept in good condition and from time to time they have to be given a good clean out. In this E-book‚ I shall give you the steps which you need to carry
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"Computer forensics is the specialized practice of investigating computer media for the purpose of discovering and analyzing available‚ deleted‚ or "hidden" information that may serve as useful evidence in a legal matter. " (Steen‚ Hassell 2004) Computer forensics has become a very important factor of criminal investigations. Since computers have become mainstream the need for a science that will deal with the technology has become an issue for the judicial and legal system. Some of the areas computer
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Super Computer The fastest type of computer. Supercomputers are very expensive and are employed for specialized applications that require immense amounts of mathematical calculations. For example‚ weather forecasting requires a supercomputer. Other uses of supercomputers include animated graphics‚ fluid dynamic calculations‚ nuclear energy research‚ and petroleum exploration. The chief difference between a supercomputer and a mainframe is that a supercomputer channels all its power into executing a
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