The term "professional" is widely used to refer to individuals with recognized expertise within a field of endeavor even though they are not a member of a licensing body or legal entity. The distinction between professional sports and amateur sports simply refers to how the athlete is funded. Similarly the distinction within creative pursuits between professional and amateur becomes somewhat grey.
Historically, behaving professionally would indicate that the person's actions remain in accordance with specific rules, written or unwritten, pertaining to behavior, dress, speech, etc. By extension, the adjective professional identified somebody recognized for expertise or skill in a craft or activity.
More on [ Professional ]
Associations :: Business
Benchmarking and Best Practices :: Management
Unions :: Labor Movement
Global Federations :: Unions

Association of Professional Researchers for Advancement - International professional association addressing the changing needs and wide scope of skills required of advancement researchers and advancement service professionals working within the non-profit community.
Financial Executives Institute - A professional association for senior financial executives representing individuals from over 8,000 corporations throughout the United States and Canada.
National Association of Industrial Technology (NAIT) - Responsible for the promotion of industrial technology in business, industry, education, and government; the accreditation of industrial technology programs in colleges, universities, and technical institutes; and the certification of industrial technologists and recognition of their continued professional development.
National Association of Sales Professionals - Association for accredited salespeople. Offers accreditation program, job bank of sales positions, and other services for career salespeople.
Professional Ethics - A Canadian clearinghouse for resources, both Canadian and international, related to ethics in the professions.
Meta Description: [ Clearinghouse for information related to ethics in the professions. ]
Society for Case Research - Assists in the development of individual efforts in the field of case writing, case teaching and case research which enhances business education.
Meta Description: [ Society for Case Research and Business Case Journal ]
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