FOR IMMEDIATE RELEASE

MHA Event Management To Become IDG Affiliate

IDG Expo Management to continue producing IDG's market-leading IT events,
develop additional world-class information shows

BOSTON, September 15, 1997 - MHA Event Management and International Data
Group today announced a new development in their long-standing and
successful relationship. Effective immediately, MHA will become an IDG
affiliate and assume the IDG name, it was announced by MHA CEO Mike Hallal
and President David B. Egan.

Under the agreement, MHA will be known as IDG Expo Management Company. The
company will continue to produce leading IDG-branded information events,
including the MACWORLD Expos, ComNet, the Telecommuting & Home Office
Exposition & Conference (THOE) and E3 - the Electronic Entertainment
Exposition.

"We are excited about becoming an IDG affiliate," said Mike Hallal. "This
agreement enhances the long-standing strategic alliance between the two
companies and creates one point of reference - that of IDG - for
world-class events and services in the minds of IT executives worldwide."

Since 1979, MHA has been the producer and management company for premium IT
trade shows branded by IDG, the leading IT media and information services
company serving more than 60 million IT professionals in 75 countries.

IDG Expo Management Company is working closely with IDG to enhance the
brand value of the current shows and, at the same time, create additional
events and services targeting buyers and sellers in the IT community.

"With today's announcement, we are reinforcing our commitment to create
world-class events and expositions for our exhibitors, attendees and other
business partners," said Egan. "This agreement allows us to enhance the
value of our current shows and pursue our originally stated mission of
continuing to develop additional world renowned expositions and services."

ABOUT IDG
Headquartered in Boston, Massachusetts, International Data Group has annual
revenues of more than $1.2 billion and 8,000 employees. Its publishing
subsidiary, IDG Communications, publishes more than 250 newspapers and
magazines in over 67 countries. IDG's trade book division, IDG Books
Worldwide, is the fastest growing computer book publisher with over 50% of
the top ten selling books with foreign translations in over 20 languages.
IDG's research subsidiary, International Data Corporation (IDC), is the
leading market research and analysis firm covering the computer field. Its
exposition management subsidiaries run over 64 computer-related expositions
and conferences in 22 countries.

ABOUT IDG EXPO MANAGEMENT COMPANY
Headquartered in Norwood, Massachusetts, IDG Expo Management Company is a
premium producer and manager of exposition events that shape the U.S. IT
marketplace. IDG Expo Management Company produces IDG-branded events
including the MACWORLD Expos; ComNet; E3 - the Electronic Entertainment
Expo, and the Telecommuting & Home Office Expo, which will launch in San
Francisco in October. Each year, more than 2,000 exhibiting companies and
more than 250,000 IT professionals attend IDG-produced events to buy, sell,
learn about and influence the IT purchasing agenda. IDG Expo Management
Company was founded in 1979 as Mitch Hall Associates.

Contacts:
Chris O'Reilly
IDG Expo Management
617-440-2756

Matthew Hutchison
Porter Novelli International
202-973-1374