Rotary is an organization of business and professional persons united worldwide who provide humanitarian service, encourage high ethical standards  in all vocations and help build goodwill and peace in the world. 
Rotary is the world's first service club. The first Rorary Club was founded in Chicago, IL on Februrary 23, 1905 by a lawyer, Paul Harris, and three of his friends. Weekly meetings were "rotated" among the founders.
Rotary is some 1.2 million service-minded men and women belonging to over 31,000 Rotary clubs in 166 nations around the world. 
Rotarians meet weekly for fellowship and interesting programs dealing with topics of local and global importance. Membership is by invitation and reflects a wide cross-section of community representation.
Rotarians plan and carry out a remarkable variety of humanitarian, educational, and cultural exchange programs that touch people's lives in their local communities and our world community.
Rotary is the Rotaty Foundation, that each year provides some $90 million for international scholarships, cultural exchanges, and humanitatian projects--large and small-- that improve the quality of life for millions of people.