FOR IMMEDIATE RELEASE

XPLAIN TO MANAGE ALL SPECIAL INTEREST PAVILIONS FOR MACWORLD CONFERENCE & EXPO
-- MacTech Central, and Other Special Interest Areas Make Their Return
-- Several New Market Segments Being Added

WESTLAKE VILLAGE, CA and FRAMINGHAM, MA -- May 1, 2002 -- Xplain
Corporation, the leader in pavilion management, and IDG World Expo, the
leading producer of world-class tradeshows, conferences and events for IT
markets around the globe, announced today that Xplain will manage all of
the pavilions at IDG World Expo's Macworld Conference & Expo, in both New
York (July 15-19, 2002), and in San Francisco (January 6-10, 2003). Special
interest areas and pavilions allow exhibitors to target attendees
interested in particular technology categories.

Macworld Conference & Expo is the world's most comprehensive Macintosh OS
event. The upcoming Macworld Conference & Expo will take place July 15-19,
2002 at the Jacob K. Javits Convention Center in New York City.

The Special Interest Pavilions, including Xplain's long running MacTech
Central(sm), have long featured both up-and-coming companies, as well as
showcased technologies. These pavilions provide exhibiting companies with
a cost-effective, turnkey method to reach their target audiences
face-to-face without requiring a large staff or display. In turn, attendees
with particular interests can experience first-hand the very latest
Macintosh technology for specific market segments in a cohesive setting.

In addition to the many returning special interest areas such as MacTech
Central, Xplain and IDG World Expo are adding a number of new market
focuses for the upcoming shows. In all, the following markets will be
represented in the shows' pavilions:

Bluetooth Mobile Computing
Wireless Technologies Enterprise Solutions
Education Server Solutions
Networking SciTech
Digital Media Small Business
Assistive Technologies Java
Scripting Solutions Internet Services
Desktop Innovations Consulting Services
Linux/Unix -) Mac OS X Ports MacTech Central

"Macworld Conference & Expo is the premier Macintosh community event. The
special interest pavilions, including MacTech Central, are a focal point at
the Expo for Macworld attendees seeking out technologies and solutions in a
specific market segment." said Neil Ticktin, CEO of Xplain Corporation.
"With a mission focused on serving the specific communities, these
pavilions have vendors of all types and sizes showcasing the best the Mac
has to offer."

"Special interest pavilions will entice attendees to test the increasing
number of hot, new products and applications at Macworld Conference and
Expo, as they meet the experts behind the technologies," said Rob
Scheschareg, vice president of sales, marketing and product development at
IDG World Expo. "We are excited that Xplain will be managing our special
interest areas. They created our most successful pavilion to date with
MacTech Central, and now other segments of the Mac community can also
benefit from their expertise."

Station packages start at $2,995 and vary according to area and applicable
discounts. For more information, contact:

Susan Worley
Direct: 805-435-1004
Main: 805-494-9797

MacTech Central
mailto:reservations@mactech.com
http://www.mactech.com/mactechcentral/

All other special interest areas
mailto:reservations@xplain.com
http://www.xplain.com/macworldexpo/

About MacTech Magazine

Established in 1984, MacTech Magazine is the only monthly magazine focused
on Macintosh technology and development. Distributed in 64 countries,
MacTech is read by tens of thousands of programmers, solution providers,
and people everywhere that want to understand what's under the hood of
Macintosh. In addition to the premier news and information vehicle for web,
networking and content coverage, MacTech continues to include several
regular columns, industry news, conference reports, product reviews, a
broad range of languages and environments, the latest in shortcuts and
insider secrets, advertisements specifically for Macintosh techies. Full
source code listings available on the World Wide Web, disk, and CD-ROM. See
http://www.mactech.com for more information.

About Xplain Corporation

Xplain Corporation has three divisions -- publishing, mail order and custom
services. The publishing division includes MacTech(r) Magazine, and THINK
Reference(tm). The mail order division operates DevDepot(r) and RadGad(sm).
Custom Services provides turnkey production services for publishers, and
tradeshow services including turnkey pavilions and onsite management.
Founded in 1984, the company has its offices in Westlake Village, CA. See
http://www.xplain.com for more information.

About Macworld Conference & Expo

Owned and produced by Framingham Mass.-based IDG World Expo, Macworld
Conference & Expo is the world's most comprehensive Macintosh OS event.
Macworld Conference & Expo showcases products and services for
professionals involved in media and creative content development for
corporate and home applications, as well as consumers using the Mac at
home. Macworld Conference & Expo brings together the loyal base of Mac OS
audiences in creative services, education, application development,
entertainment, small office/home office and Internet-based environments.
Macworld Conference & Expo offers professionals and consumers alike the
opportunity to discover the latest developments and hottest products these
markets offer. For more information, please visit the Web site at
http://www.macworldexpo.com.

About IDG World Expo

IDG World Expo (http://www.idgworldexpo.com) produces IT-focused
tradeshows, conferences and events for professionals seeking world-class
education, peer-to-peer networking and one-stop comparison shopping. As the
leading IT event management company, IDG World Expo leverages its
experience and knowledge of IT-focused events and conferences, enabling
technology companies to capture the attention and loyalty of influential
buyers. IDG World Expo's portfolio of conferences and events includes
Macworld Conference & Expo, LinuxWorld Conference & Expo, BioITWorld
Conference & Expo and COMNET Conference & Expo. IDG World Expo is a
business unit of IDG, the world's leading technology media, research and
event company.

About IDG

IDG publishes more than 300 magazines and newspapers and offers online
users the largest network of technology-specific sites around the world
through IDG.net (http://www.idg.net), which comprises more than 330
targeted Web sites in 80 countries. IDG is also a leading producer of 168
computer-related events worldwide, and IDG's research company, IDC,
provides global market intelligence and advice through 51 offices in 43
countries. Company information is available at http://www.idg.com.