IRE Copyright copyright Butterworth & Company Karen Sparck Jones All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, including photocopying and recording, without the written permission of the copyright holder, application for which should be addressed to the Publishers. Such written permission must also be obtained before any part of this publication is stored in a retrieval system of any nature. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, including photocopying and recording, without the written permission of the copyright holder, application for which should be addressed to the Publishers. Such written permission must also be obtained before any part of this publication is stored in a retrieval system of any nature. This book is sold subject to the Standard Conditions of Sale of Net Books and may not be re- sold in the UK below the net price given by the Publishers in their current price list. First published 1981 © Butterworth & Co. (Publishers) Ltd, 1981 British Library Cataloguing in Publication Data Information retrieval experiment. 1. Information storage and retrieval Systems - Evaluation I. Jones, Karen Sparck 025'.04 Z699 8042222 ISBN O[OCRerr]O8-lO648[OCRerr] Typeset by CCC in Great Britain by William Clowes (Beccies) Limited, Beccles and London Printed and Bound by Robert Hartnoll Ltd, Bodmin, Cornwall