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- Edge-notched_card abstract "Edge-notched cards, or McBee cards, were a manual data storage and manipulation technology invented in 1896 and used for specialized data storage and cataloging applications through much of the 20th century. While there were many variants, a popular version consisted of 5 inch by 8 inch paperboard cards with holes punched at regular intervals along all four edges, a short distance in from the edges. The center of the card might be blank space for information to be written, or contain a pre-printed form. To record data, the paper stock between a hole and the nearest edge was removed by a special notching tool. The holes were assigned a meaning dependent upon a particular application. For example, one hole might record the answer to a yes/no question on a survey, with the presence of a notch meaning yes. More complex data was encoded using a variety of schemes, often using a superimposed code which allows more categories to be coded than the number of holes available. To allow a visual check that all cards in a deck were oriented the same way, one corner of each card was beveled, much like Hollerith punched cards. Edge-notched cards, however, were not intended to be read by machines. Instead, they were manipulated by passing one or more slim needles through selected holes in a group of cards. As the needles were lifted, the cards that were notched in the hole positions where the needles were inserted would be left behind as rest of the deck was lifted by the needles. Using two or more needles produced a logical and function. Combining the cards from two different selections produced a logical or. Quite complex manipulations, including sorting were possible using these techniques.Before the widespread use of computers, some public libraries used a system of small edge-notched cards in paper pockets in the back of library books to keep track of them.".
- Edge-notched_card thumbnail Edge-notched_card.jpg?width=300.
- Edge-notched_card wikiPageExternalLink The_Illinois_E_Z_Sort_Anesthesia_Record_Card.5.aspx.
- Edge-notched_card wikiPageExternalLink 149106.html.
- Edge-notched_card wikiPageExternalLink c160002a019.
- Edge-notched_card wikiPageExternalLink content&file=punchedcards.xml&xsl=article.xsl.
- Edge-notched_card wikiPageExternalLink 102647065.
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- Edge-notched_card wikiPageExternalLink one_dead_media.php.
- Edge-notched_card wikiPageID "7696559".
- Edge-notched_card wikiPageRevisionID "590111309".
- Edge-notched_card hasPhotoCollection Edge-notched_card.
- Edge-notched_card subject Category:Business_documents.
- Edge-notched_card subject Category:Ephemera.
- Edge-notched_card subject Category:Storage_media.
- Edge-notched_card type Artifact100021939.
- Edge-notched_card type Instrumentality103575240.
- Edge-notched_card type Medium106254669.
- Edge-notched_card type Object100002684.
- Edge-notched_card type PhysicalEntity100001930.
- Edge-notched_card type StorageMedia.
- Edge-notched_card type StorageMedium106263762.
- Edge-notched_card type Whole100003553.
- Edge-notched_card comment "Edge-notched cards, or McBee cards, were a manual data storage and manipulation technology invented in 1896 and used for specialized data storage and cataloging applications through much of the 20th century. While there were many variants, a popular version consisted of 5 inch by 8 inch paperboard cards with holes punched at regular intervals along all four edges, a short distance in from the edges.".
- Edge-notched_card label "Edge-notched card".
- Edge-notched_card sameAs m.02695yr.
- Edge-notched_card sameAs Q5337636.
- Edge-notched_card sameAs Q5337636.
- Edge-notched_card sameAs Edge-notched_card.
- Edge-notched_card wasDerivedFrom Edge-notched_card?oldid=590111309.
- Edge-notched_card depiction Edge-notched_card.jpg.
- Edge-notched_card isPrimaryTopicOf Edge-notched_card.