Chapter 2 IPC Using Job Control Words and Other Variables

Processes belonging to the same job or session can communicate with each other through session-level variables. Job Control Words (JCWs) are a subset of session variables. All session variables, including JCWs, reside in the session variable table.

	NOTE: Variables are used in the same wayin both jobs and sessions. In this chapter, the term "session variable" is used to refer to both job-level and session-level variables.