Internet World Endorsed by Association of Internet Professionals.

Business Editors, Hi-Tech Writers

DARIEN, Conn.--(BUSINESS WIRE)--April 11, 2001

Industry trade group gives seal of approval to leading

Internet business magazine, trade show and Web site

The Association of Internet Professionals (AIP) today announced the formal endorsement of Penton Media's (NYSE:PME) Internet World magazine, Internet World events and Internetworld.com.

In addition, as part of this strategic partnership, AIP member companies will receive special member savings related to their marketing and advertising efforts with Internet World properties.

"Internet World has quickly established itself as the dominant media brand targeting Internet business decision makers," stated Stephen P. Lawson, AIP's Executive Director. "With a global magazine circulation of over 540,000 twice monthly and a worldwide trade show attendance in excess of 750,000, Internet World's reach is staggering. But most importantly, the content has always been and continues to be of the highest standards. Internet World was a clear choice for our endorsement."

"Internet World and the AIP are clear leaders in their respective areas within the industry," stated Courtney Muller, VP of Internet World events. "By working together, we can extend our brands and offer valuable benefits to our community members. There's true synergy in this partnership, and we're proud to be associated with the AIP."

Internet World's Publisher, Phil Ripperger, added, "This endorsement is a clear sign from the industry that Internet World has succeeded in providing the key information and analysis that our Internet business strategists need to succeed. AIP's corporate and individual members are the industry's elite. We look forward to a long partnership working with and providing mission-critical information to these members."

Upcoming Internet World events include:

- Internet World Chicago, July 10 - 12, McCormick Place, Chicago, IL

- Internet World Fall, October 1 - 5, Jacob Javits Convention Center, New York,
NY

- Internet World Wireless, December 3 - 6, McEnery Convention Center, San Jose,
CA

About the Association of Internet Professionals (AIP)

The Association of Internet Professionals (AIP) is the premier professional association for Internet professionals worldwide. AIP, founded in 1994, is the largest and fastest growing professional association in the industry. In order to unify, support and represent the global community of Internet professionals, AIP provides the benefits and programs that allow both its individual and corporate members to succeed in today's Internet/Intranet/Extranet marketplace. The organization also serves as the voice of Internet professionals and industry corporations before the public, press, and within the online community on issues shaping the future of the Internet. AIP's web site can be found at http://www.association.org.

About Internet World

Internet World is produced by Penton Technology Media, a division of Penton Media that includes in-print, in-person and online media serving the global Internet and service provider sectors. In addition to Internet World, its media brands include ISPCON events, Streaming Media shows, m-Commerce World, Streaming Media and Boardwatch magazines. For more information, visit http://www.internetworld.com.

Penton Media, Inc. (NYSE: PME) is a leading diversified business media company that produces market-focused magazines, Web sites, trade shows, and conferences. Penton serves the Internet/broadband; information technology; natural products/food/retail; manufacturing; electronics; design/engineering; management; supply chain/aviation; government/compliance; mechanical systems/construction; and leisure/hospitality markets. For more information, visit http://www.penton.com.