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.
Hugh Ferriss Architectural Drawings and Papers Collection
This collection was donated to Avery Library by his family after Ferriss' death, and has been supplemented by several later additions from other sources. All 363 original drawings in the collection have been photographed and digitized.
An online collection of the Tibet Mirror (Tib. Yul phyogs so so'i gsar 'gyur me long), published in Kalimpong, India from 1925 to 1963. Seventy percent of the full run is now available thanks to the generous cooperation of Yale University, Collège de France, and the Musée Guimet.