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: Unlike DB2's tables/rows, IMS uses a parent-child hierarchy. The top segment is the Root .

: In-depth tutorials covering the program development process, coding standards, file status codes, and table handling. JCL (Job Control Language) mainframe refresher part 2 by muthu pdf format best

: In-depth coverage of the COBOL programming language, including its history, development process, and complex structures like the clause and file handling. JCL (Job Control Language) : Unlike DB2's tables/rows, IMS uses a parent-child