The TSO/E Environment Service builds and initializes a TSO/E environment outside of the TSO/E TMP and Service Routines. The TSO/E environment provides access to common TSO/E programming services. This section discusses the function of the TSO/E Environment Service and the particular services that are available.

The TSO/E Environment Service establishes a TSO/E environment in background mode, where input is from an alternate input source, such as a data set. Unlike the TSO/E TMP and Service Routines environment, which may attach a Command Processor, you invoke the TSO/E Environment Service from your program, which then acts like a Command Processor. Your program can then issue TSO/E services and macros that use the TSO/E environment.