Earlier document automation systems photographed documents for storage on microfilm or microfiche. The collection contains 350,000 printed volumes and 513,000 items of microfilm and microfiche. Three formats are common&colon; microfilm (reels), microfiche (flat sheets), and aperture cards. EDMS could provide online access to information formerly available only on paper, microfilm, or microfiche. The library is also the home for the Ethiopian Manuscript Microfilm Library. Archivists did not microfilm photographs and blueprints of the Carnegie Libraries. The library is in the process of digitizing much of its microfilm collection. This is the rating required to protect microfilm, microfiche, and other film-based information storage media. The collection consists of manuscripts, texts, photographs, audio-visual material, microfilm, music, and artifacts. It has been released on microfilm (133 reels). Reproducing brittle newspapers onto microfilm is an example of such migration. It implies the conversion of data to digital and traditional forms, including paper and microfilm. Both are fully open for research and have been distributed to other libraries on microfilm. The American Philosophical Society has a copy of the microfilm as well. Use of these microfilm systems saved significant volumes of cargo capacity needed for war supplies.