The Baltimore Antique Bottle Club, Inc. is a nonprofit organization whose mission is to educate the public about antique bottle collecting and to promote the hobby.

The Jewish Museum of Maryland is America's leading museum of regional Jewish history, culture and community.

The National Archives and Records Administration (NARA) is the nation's record keeper.

The AOA welcomes as members individual appraisal practitioners, appraisal management companies, educators, and organizations that share the AOA's aims.

Founded in 1974 by Charlotte Kneeland, the International Side Saddle Organization is one of the oldest groups devoted to aside riding.

The NAAA provides a unified voice for the auto auction industry, protects and promotes the interests of its members and leads with the highest ethical standards.

The Walters Art Museum, located in Baltimore, Maryland's Mount Vernon neighborhood, is a public art museum founded in 1934.

The United States Naval Academy Museum is a public maritime museum in Annapolis, Maryland, United States. Its history dates back to 1845.

It began with a small but dedicated group of collectors, who, through the courtesy of the late Sammy Cahn, president of the Songwriters' Hall of Fame, met at One Times Square to exchange sheet music and stories about songwriters, singers, and songs.

Formed in 1967, the Society for Historical Archaeology (SHA) is the largest scholarly group concerned with the archaeology of the modern world (A.D. 1400-present).