Professional Congress Organizers (PCO) are companies which are specialized into the organization and management of congresses. PCOs can work as consultants for academic and professional associations and usually provide full services management for conferences including but not limited to conference design, program development, bidding document, registrations, site and venue selection and booking, audio-visuals, IT support, logistics, leisure management, marketing, printing and web services, fundraising, sponsorship and exhibitor sales, financial management, budget control... The Paris Convention Bureau recommend its Parisian PCOs partners.