Card image
From Wikipedia, the free encyclopedia
Card image is an archaic term for a character string, usually 80 characters in length, that was, or could be, contained on a single punched card. IBM cards were 80 characters in length, UNIVAC cards were 90 characters. A punched card typically held multiple data fields, some numeric, some alphabetic. Many data formats, such as the FITS image file format, still use card images as basic building blocks -- even though punched cards are now mostly obsolete.
External links
- RFC 678: Standard File Formats. The card image format is defined in the section "Standard Formats" of this RFC.
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