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Пишет kouzdra (![[info]](http://lj.rossia.org/img/userinfo.gif){kind=small} kouzdra)@ 2013-09-17 23:06:00 |
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Еще о происхождении стандартов:
Размер перфоркарт был выбран под размер долларов 1887 года образца - для удобства перевозки в тех же ящиках:
http://www.columbia.edu/cu/computinghis
Cards had one one corner cut diagonally to protect against upside down and/or backwards cards that might not otherwise be detected and the reading board had the same cut for obvious reasons (image from [69]). The card measures 3.25 by 7.375 inches, the same size as the 1887 US paper currency because Hollerith used Treasury Department containers as card boxes (pictures not actual size, but all to the same scale)
Размер перфоркарт был выбран под размер долларов 1887 года образца - для удобства перевозки в тех же ящиках:
http://www.columbia.edu/cu/computinghis
Cards had one one corner cut diagonally to protect against upside down and/or backwards cards that might not otherwise be detected and the reading board had the same cut for obvious reasons (image from [69]). The card measures 3.25 by 7.375 inches, the same size as the 1887 US paper currency because Hollerith used Treasury Department containers as card boxes (pictures not actual size, but all to the same scale)
