Index of cooperation

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.

References

 This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C" (in support of MIL-STD-188).