What is z/OS Unicode Services?

z/OS Unicode Services is the Unicode environment on z/OS and consists of two main components:

z/OS Unicode application programming interfaces services listed below and described in more detail in Application programmer information.
The infrastructure, described in System programmer information, which provides the z/OS Unicode environment needed to run the z/OS Unicode application programing interfaces.

The z/OS Unicode environment is ready for use after IPL has completed, requiring no action by the system operator.