Software components
This chapter describes the concepts and functions of the mainframe operating systems. It describes z/OS, z/VM, Linux on System z, and (briefly) z/VSE and z/TPF.
This chapter explains z/OS internals and some of the z/OS key functions that contribute to its reliability, strength, flexibility, and security. These functions include authorized program facility (APF) and supervisor calls (SVCs), and functions such as the Systems Management Facility (SMF) and System Authorization Facility (SAF). This chapter describes some of the z/OS ...

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