Original sentence: Other companies offer related services including travel agents and public relations companies.PCOs work as consultants for academic and professional associations.They tend to focus on limited areas such as destination management.They usually provide full service management for conferences including but not limited to conference design, registration, site and venue selection and booking, audiovisuals, IT support, logistics, leisure management, marketing, printing and web services, sourcing speakers, funding and sponsorship, financial management and budget control
Edited sentence: However, the service offered by such companies is partial e.Many other companies offer PCO-related services including travel agents, public relations companies etc.PCOs work as consultants for a professional association's, organisation's or other entity's organising committee.They differ from PCOs in that their core business is not professional conference organisation and, in some cases, they are not impartial due to the nature of their core business.They usually provide full service management, including but not limited to congress design, registration, site and venue selection and booking, audiovisuals, IT support, logistics, leisure management, marketing, printing and web services, sourcing speakers, funding and sponsorship, financial management and budget control, research, etc.destination management