Information technology (IT) is the use of computers to store, retrieve, transmit, and manipulate data,[1] or information, often in the context of a business or other enterprise.[2] IT is considered to be a subset of information and communications technology (ICT). An information technology system (IT system) is generally an information system, a communications system or, more specifically speaking, a computer system – including all hardware, software and peripheral equipment – operated by a limited group of users. Humans have been storing, retrieving, manipulating, and communicating information since the Sumerians in Mesopotamia developed writing in about 3000 BC,[3] but the term information technology in its modern sense first appeared in a 1958 article published in the Harvard Business Review; authors Harold J. Leavitt and Thomas L. Whisler commented that "the new technology does not yet have a single established name. We shall call it information technology (IT)." Their definition consists of three categories: techniques for processing, the application of statistical and mathematical methods to decision-making, and the simulation of higher-order thinking through computer programs.[4] The term is commonly used as a synonym for computers and computer networks, but it also encompasses other information distribution technologies such as television and telephones. Several products or services within an economy are associated with information technology, including computer hardware, software, electronics, semiconductors, internet, telecom equipment, and e-commerce.[5][a] Based on the storage and processing technologies employed, it is possible to distinguish four distinct phases of IT development: pre-mechanical (3000 BC – 1450 AD), mechanical (1450–1840), electromechanical (1840–1940), and electronic (1940–present).[3] This article focuses on the most recent period (electronic), which began in about 1940.

          
IF I DID IT.
          
                                      

          Copyright © 2006 by O.J. Simpson.
          All rights reserved. Printed in the
          United Statesof
          America. No part of this book may
          be used or reproduced in any mannerwhatsoever 
          without written permission except in the case
          of brief quotations embodied in critical 
          articles and reviews. For
          information, address Harper Collins Publishers,
          10 East 53rd Street, New York,NY 10022.
          Harper Collins books may be 
          purchased for educational,
          business, or sales promotional use. For
          information please write: Special
          Markets Department, HarperCollins 
          Publishers,SS 10 East 53rd
          Street, New York, NY 10022.For editorial
          inquiries, please contact Regan, 10100 Santa
          Monica Blvd., 10th floor, Los Angeles,
          CA 90067.FIRST EDITIONDesigned by Kris Tobiassen
          Library of Congress Cataloging-in-Publication Data 
          has been applied for.
          ISBN 10: 0-06-123828-7
          ISBN 13: 978-0-06-123828-4
        

---

         *****************************************************************************************************

---

Developed by: Bazid and Afan Close