How long have punch cards been around? The idea of a punched card dates back centuries even before its invention was credited to Herman Hollerith in 1880 when he patented the use of punched cards for tabulating census data by the US Census Bureau. However, it wasn’t until the 1950s tha...
In early computers, the only UIs were a few buttons on an operator's console. Many of these computers usedpunched cards, prepared using keypunch machines, as the primary method of input for computer programs and data. While punched cards have been obsolete in computing since 2012, some voti...
If information were outputted (printed), it would be outputted as punch cards.The largest punch card program was from the 1950s SAGE air defense system, which used 62,500 punched cards (around 5 MB of data). In the picture below, a woman stands next to the punch cards used in this...
CRTs were already being used for television and oscilloscope output, but nobody had thought of combining this technology with computers. The first time they were used to display computer output was in 1951 at MIT (the Massachusetts Institute of Technology) where the Whirlwind computer was developed...
the eniac's calculations took place inside its electronic circuits. the results were obtained through lights, switches, and punched card output devices. how did the eniac's size and weight compare to modern computers? the eniac was massive, occupying a room of about 1,500 square feet and ...
Paper tape and punched cards were supplanted bymagnetic tape, which eventually gave way tomagnetic floppy disks. Hard disk drives (HDDs) and solid-state drives (SSDs) are now the primary forms of storage. How storage media works Media used in computer storage receive messages in the form of...
A punch card is a simple piece of paper stock that can hold data in the form of small punched holes, which are strategically positioned to be read by computers or machines. It is an early computer programming relic that was used before the many data storage advances relied upon today. ...
The lean manufacturing process, also referred to as lean production, was first implemented in the Toyota production system (TPS) in Japan, which revolutionized the company’s manufacturing process and then expanded all over the world. The principles of lean manufacturing were formalized during the 19...
Other times, companies pay the price for unproductive working time. Without recording working hours, there’s no way of knowing who did what and when. Timesheets emerged in the 19th century to solve this problem (or at least help make it less of an issue). Evolving from punch cards and ...
A variation on the pinhole theme is the "pinhole mirror." Cover a pocket mirror with a piece of paper that has a ¼-inch (7 mm) hole punched in it. Open a sun-facing window and place the covered mirror on the sunlit sill so it reflects a disk of light onto the far wall inside...