# Collective Intrinsic Subroutines

The following table lists collective intrinsic subroutines.

Collective Operation
Name | Procedure Type | Description
--- | --- | ---
CO_BROADCAST | Intrinsic Subroutine | Broadcasts a value to other images.
CO_MAX | Intrinsic Subroutine | Finds maximum value across images.
CO_MIN | Intrinsic Subroutine | Finds minimum value across images.
CO_REDUCE | Intrinsic Subroutine | Performs user-defined reduction across images.
CO_SUM | Intrinsic Subroutine | Performs sum reduction across images.

Parent topic: Language Summary Tables