A punched card (also punch card [1] or punched-card [2]) is a piece of card stock that stores digital data using punched holes. Punched cards were once common in data processing and the control of automated machines.

In the late 1880s, inventor Herman Hollerith, who was inspired by train conductors using holes punched in different positions on a railway ticket to record traveler details, invented the recording of data on a machine-readable punched card. Hollerith’s cards were used for the 1890 US Census, which finished months ahead of schedule and under ...

Herman Hollerith (February 29, 1860 – November 17, 1929) was a German-American statistician, inventor, and businessman who developed an electromechanical tabulating machine for punched cards to assist in summarizing information and, later, in accounting.

The Hollerith punched card was the principal means for recording, accounting and archiving functions, not to mention the US census, until recently. In the early 1960's Hollerith cards were the only practical means to input programs for a IBM mainframe, but today these cards are …

2019年3月27日 · Hollerith invented and used a punched card device to help analyze the 1890 U.S. census data. His great breakthrough was his use of electricity to read, count and sort punched cards whose holes represented data gathered by the census-takers.

In the late 1880s, American engineer Herman Hollerith saw a railroad punch card when he was trying to figure out new ways of compiling statistical information for the U.S. Census. His first punch card, like those used on railways, only had holes along the edges.

Hollerith’s punched card tabulator, developed in the 1880s, eased the administrative burden of hand-counting the population in a country whose numbers were exploding.

In the late 1880s, American engineer Herman Hollerith saw a railroad punch card when he was trying to figure out new ways of compiling statistical information for the U.S. Census. His first punch card, like those used on railways, only had holes along the edges.

The use of punched cards for data processing/storage can be traced back to German-American inventor Herman Hollerith, who sped up and partially mechanised data processing for the 1890 US census...

Hollerith quickly became intrigued by the problem of compiling Census statistics. By 1887 he had devised a tabulating system that included cards, a special punch for making holes in them at select locations to represent Census data, a tabulator that counted data on the cards, and a sorter that eased the task of sorting the cards for reuse.