OSA | Living History

In a century, OSA has grown from 30 charter members to 20,000 members from 180 Countries

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30 Members Establish OSA - Annual Meeting

In 1916, members of the Rochester section sent a copy of the constitution and invitation to become a charter member of OSA to 40 men around the country.

The first 30 to respond became charter members. This picture was taken at OSA's first Annual meeting. (Photo: OSA Archives)

(Courtesy of OSA Archives)