BS 6541:1985
Specification for check character systems for use in information interchange, and guidance on choice and methods of application
Describes 8 check character systems capable of protecting strings against errors that occur when people copy or key data; includes conformance requirements for products described as generating check characters or checking strings using those systems; includes guidance on selection of check character systems for application. Excludes systems designed specifically to permit both error detection and automatic correction, to detect fraud, to check strings interchanged only between machines.
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