TSO/SPF refers to Time Sharing Option/System Productivity Facility. TSO is an interactive time-sharing environment for IBM mainframe operating systems, particularly z/OS. SPF is an ISPF (Interactive System Productivity Facility) application that provides a full-screen editor and utilities for managing datasets (files) on the mainframe. It's commonly used by programmers and system administrators for tasks like coding, editing, compiling, debugging, and managing JCL (Job Control Language) and other mainframe resources.
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