APIS: Advanced Papyrological Information System
APIS is a component of the larger Papyrological Navigator database, a worldwide aggregation of digital images, metadata, translations and transcriptions of papyri and ostraca (clay tablets). A listing of Columbia's ca. 5,800 papyri and ostraca can be viewed here
Columbia Historical Corporate Reports: Digitized Reports from Watson Library's Collection
Selected from the collections of Columbia's Watson Library of Business & Economics, this collection presents ca. 770 digitized reports issued between 1850-1960 by some 36 companies, including department stores, utilities, banks, and railroads.
Greene & Greene Architectural Records and Papers Collection
An online collection guide and image database of architectural designs and drawings by Charles Sumner Greene and Henry Mather Greene, architects of the American Arts and Crafts Movement.
Real Estate Record and Builders Guide
Digitized volumes of The Real Estate Record and Builders Guide, a magazine detailing building activity in New York City and its environs that began publication in the late 1860s. The project website provides sales, mortgage, conveyance, and other data as well as illustrated articles on buildings and neighborhood development.