Also, see the use of a metal plate as a binary storage device for fonts used for the print on punch cards with the IBM key punches: https://www.masswerk.at/mis

Also, see the use of a metal plate as a binary storage device for fonts used for the print on punch cards with the IBM key punches: https://www.masswerk.at/misc/card-punch-typography/ https://www.masswerk.at/misc/card-punch-typography/