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Learn about the electromechanical machine that assisted in summarizing information stored on punched cards, invented by Herman Hollerith for the 1890 U.S. Census. Explore the evolution, applications, and operation of tabulating machines and their impact on data processing industry.
A punched card sorter is a machine for sorting decks of punched cards. Sorting was a major activity in most facilities that processed data on punched cards using unit record equipment . The work flow of many processes required decks of cards to be put into some specific order as determined by the data punched in the cards.
Herman Hollerith was an American statistician, inventor, and businessman who developed an electromechanical tabulating machine for punched cards to assist in summarizing information and, later, in accounting. He founded a company that became IBM and revolutionized data processing with his invention.
An aperture card is a punched card with a microfilm window for archiving or copying documents. Learn about its advantages, disadvantages, usage, machinery and conversion to digital format.
Learn about the origins and development of optics from ancient times to modern days. Explore the contributions of Greek, Roman, Islamic, and European scholars to the fields of geometrical, physical, and physiological optics.
A trade card is a small card used by merchants and traders to announce their business and give directions to their customers. Learn about the origins, evolution and design of trade cards from the 17th to the 19th century, and see some examples from different countries and industries.
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