Abstract: Throughout the 20th century, the New York City Police Department (NYPD) conducted overt and covert surveillance on groups and individuals identified as potential security threats to the City. This collection comprises black and white 16 mm silent surveillance films. They were shot by the NYPD Photo Unit for Manhattan (PUM) for the Bureau of Special Services and Investigations (BOSSI). The subjects include a broad range of political activist groups and events from 1960 to 1980. The films are...