ISO 1681:1973 Preview
Information processing -- Unpunched paper cards -- Specification
This standard was last reviewed and confirmed in 2001. Therefore this version remains current.
Defines the characteristics of general-purpose unpunched paper cards to be used information interchange between different punched card devices. References: ISO/R534; ISO/R 536; ISO/R 1974; ISO/R 2144; ISO 2493; ISO 2494; ISO 2758.
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