Index of cooperation
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In telecommunication, the term index of cooperation (diametral index of cooperation, international index of cooperation) has the following meanings:
- In facsimile, the product of the total line length and the number of lines per unit length, divided by π.
- For rotating devices, the product of the drum diameter and the number of lines per unit length.
Source: from Federal Standard 1037C and from MIL-STD-188