2 ABCs of z/OS System Programming Volume 1
1.1 z/OS services
Figure 1-1 z/OS services
z/OS services
z/OS, as an operating system, provides program management services that let you create,
load, modify, list, read, and copy executable programs.
The z/OS system provides solutions for the following major areas:
Data management: z/OS provides a set of functions to manage storage resources on the
system, support storage and retrieval of data on disk, optical and tape devices, program
management functions, and device management functions to define and control the
operation of input and output storage devices. Distributed File Manager (DFM) supports
access to remote data and storage resources.
Softcopy publications services: These services improve productivity in systems
installation and management.
Security services: Security and Cryptographic Services are a set of products and
features used to control access to resources, and to audit and manage the accesses with
appropriate centralized or decentralized control. These services form the basis for all
security services for traditional applications, UNIX applications, and distributed systems.
System management services: The functions and features provided with z/OS allow
robust control and automation of the basic processes of z/OS, thus increasing availability,
improving productivity of system programmers, and providing a consistent approach for
configuring z/OS components of products.
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64-bit z/Architecture
z/OS
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