PUBLICATIONS OFFICE: ACM, 2 Penn Plaza, Suite 701, New York, New York 10121-0701, [phone], FAX: [phone]

Group Publisher: Scott Delman

Executive Editor: Ken Korman Managing Editor: Denise Doig Art Director: Andrij Borys Production Manager: Lynn D’Addesio-Kraus Media Sales: Jonathan Just

Contributing Editors: Books: Michele Tepper ( [e-mail]) Business the 8th Layer: Lynn Greiner ( [e-mail]) Net News: Alan Zeichick ( [e-mail]) Putting it Together: Win Treese ( [e-mail])

Editorial advisory board: Grady Booch Bran Ferran Jim Gemmell David S. Isenberg Jakob Nielsen Donald A. Norman Daniel Rosenberg

ACM Advertising Department 2 Penn Plaza, Suite 701 New York, NY 10121-0701 [phone]; Fax [phone] Director of Media Sales: Jonathan Just email: [e-mail]

net Worker (ISSN 1091-3556) is published four times a year in March, June, September, and December by the Association for Computing Machinery, Inc., 2 Penn Plaza, Suite 701, New York, NY 10121-0701.

Periodical class postage paid at New York, NY 10001, and at additional mailing offices. Printed in the U.S.A.

POSTMASTER: Send address changes to net Worker, ACM, 2 Penn Plaza, Suite 701, New York, NY 10121-0701.