Technical Information › Operating System Configuration

Operating System Configuration

This chapter examines the configuration of the operating system. It includes information about the internal components of z/OS. It describes the concerns you should keep in mind as you review z/OS with the Technical Information menu options:

• Ways in which a subsystem can be defined to z/OS and the possible security exposures of user subsystems
• How I/O appendages can subvert the system
• Use of system exits and the need to review them
• Security‑related concerns for the z/OS link pack area (LPA), the modified link pack area (MLPA), fixed link pack area (FLPA), z/OS program properties table (PPT), and supervisor calls (SVCs)