IRE Contributors contributors 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. Contributors Elizabeth D. Barraclough Computing Laboratory University of Newcastle upon Tyne Nicholas J. Belkin Centre for Information Science The City University William S. Cooper School of Library and Information Studies University of California at Berkeley Lynn Evans formerly INSPEC, Institution of Electrical Engineers Michael D. Heine I)cpartment of Librarianship Ncwcastle upon Tyne Polytechnic j4[OCRerr] Michael Keen ollege of Librarianship Wales F. Wilfrid Lancaster irtduate School of Lihrdry Scicuce niversity of Ill inois at [OCRerr]rbdn[OCRerr]-( h[OCRerr]rnpdi{n Robert N. Oddy omputer Ccntrc niversity of Aston in Birmingham (`ornelis J. van R[OCRerr]sbergen )cpartmcnt of (omputcr Scicncc I niversity Collcgc Dublin [OCRerr]tephen E. Robertson cutre for Informition Scicncc lhc City [OCRerr]nIvcrsitv (;erard Salton l)cpartmcnt of (()mpatcr [OCRerr]cic!)cc [OCRerr])rnell Univcrsitv