Professional Dreamers
Eastern Professional Hockey League (2008–2009)
Professional Women's Hockey League
Saudi Professional League
World Professional Darts Championship
Electrolux Professional
Ontario Professional Hockey League
Southern Professional Hockey League
Liberty Professionals FC
Business and Professional Women
Lovely Professional University
World Professional Darts Championship 2010
Toronto Professionals
Professional Bull Riders
Bally Astrocade
Women's Professional Basketball League
Pittsburgh Professionals
Galt Professionals
Maritime Professional Hockey League
Scottish Professional Football League
International Federation of Business and Professional Women
Professional Players Tournament 1982
International Guild of Professional Butlers
Cyberathlete Professional League
Professional Golfers' Association
Dalian Professional FC
Nippon Professional Baseball
Professional Developers Conference
Pontins Professional
Fifpro
Professional Golfers' Association of America
BPW, Business and Professional Women
Nigerian Professional Football League
Professional Fighters League
International Professional Hockey League
Timiskaming Professional Hockey League
Scuola Universitaria Professionale della Svizzera Italiana
Boston Professional Hockey Association
Ladies Professional Golf Association
World Professional Association for Transgender Health
Professional Chess Association
Women's Professional Soccer
United States Professional Volleyball League
Major Arena Soccer League
The Association of Professional Schools of International Affairs
ASIS International
Central Hockey League (1963–1984)
Ivor Spencer School for Butlers
Professional Association for Childcare and Early Years
Yuppie
Chinese Professional Baseball League
Professional Association of Diving Instructors
Fribrottning
Windows XP
National Football League
ATP-touren
Professionalnaja basketbolnaja liga
Profesionalna chokejna liha
The International Alliance for Women
Segunda División Profesional de Chile