+A cog is a tooth on a [Gear](/wiki/Gear), precisely shaped to interlock and transmit force or [Motion](/wiki/Motion). Fundamental to many mechanical devices, it symbolizes the small, essential part within a larger [System](/wiki/System).
+## See also
+- [Mechanism](/wiki/Mechanism)
+- [Machine](/wiki/Machine)
+- [Interdependence](/wiki/Interdependence)
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