And they then wrote code, usually machine code, sometimes binary code, which was then sent by mail to a data center to be punched onto paper tape or card and then re-punched, in order to verify it.
Apoi scriau cod, de obicei cod maşină câteodată cod binar care era trimis pe mail unui centru de date pentru a fi perforat pe cartele sau card şi apoi reperforat pentru a fi verificat.