TSO/ISPF is a mainframe interactive environment. TSO (Time Sharing Option) provides the basic command-line interface to the z/OS operating system. ISPF (Interactive System Productivity Facility) builds upon TSO to provide a full-screen, menu-driven interface for tasks such as editing files, submitting batch jobs, browsing datasets, and managing system resources. ISPF is commonly used by mainframe developers, system programmers, and operations staff.
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