- Conference Management Institute, The
 - Bethesda - Serves the U.S. market for international conferences, exhibitions and corporate events. Specialists in short or long term event marketing and management. - Hargrove
- Lanham - Provides planning, design, and construction services for trade shows, conventions, special events, and parades.
- Hughes Group, The
- Silver Spring - Offers exhibit graphics, portable and modular displays, as well as promotional and collateral materials.
- Nomadic Display
- Springfield - Producer of portable and modular display systems.
- On Location
- Rockville - Planning association meetings, corporate teambuilding, executive retreats, and more.
- On-Site Productions, Inc.
- Alexandria - Event-meeting planning and destination management company assisting businesses with their incentive and team building needs.
- Personal Convention Services, Inc.
- Fairfax - Rents copiers, computers, fax machines and other office equipment for trade shows, conventions and meetings.
- Production Group Internation
- Arlington - Global events, entertainment, exhibitions, and business communications company.
- Ritz Audio Visual Associates
- Beltsville - Offers LCD projectors and a range of audio visual products for sale and rental.
- Tradeshowdirect
- Springfield - Specialising in trade show displays and large format digital graphics.
- VNU Expositions
- Chantilly - Operates, arranges and organises trade shows and conferences for associations, corporations and government entities.
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