Arnold H. Rosenberg (July 12, 1935-September 12, 2007) was an openly gay baker, entrepreneur, attorney, and administrator. In these letters addressed to his daughter Amy Rosenberg, Arnold Rosenberg describes his attempts to grow his small pastry business, his relationship with Joel Prybutok and Joel's daughter Sonya, and his everyday life as a wealthy resident of Center City, Philadelphia, and later San Francisco, going to dinners and enjoying films and museum trips.

While abroad for work in Amsterdam, the Netherlands, in the early 1960s, American Charles Allyn Weeks began a romantic relationship with a Dutch university student several years his junior. The Weeks collection is comprised of 11 letters sent from the Dutchman in Amsterdam to Weeks in Philadelphia, plus 15 black and white photographs of the pair with their poodle Parké taken in Amsterdam, the Netherlands.

The Gay and Lesbian Switchboard of Philadelphia operated at a series of locations in the city from 1973 to 1998. It aimed to provide information, counseling, and referrals to the gay and lesbian community via a call-in phone line. The Switchboard records are comprised of a range of business-related organizational materials dating from the mid 1970s through the late 1990s.