Mainframe. a. COBOL - COBOL is a third-generation programming language and one of the oldest programming languages still in active use. Its name is an acronym, for Common Business Oriented Language, defining its primary domain in business, finance, and administrative systems for companies and governments. IDMS - IDMS (Integrated Database Management System) is a (network) CODASYL database management system. Backend. c. VSAM - Virtual Storage Access Method (VSAM) is an IBM disk file storage scheme first used in the OS/VS2 operating system and later used throughout the MVS architecture. VSAM comprises four access methods: Key Sequenced Data Set (KSDS), Relative Record Data Set (RRDS), Entry Sequenced Data Set (ESDS) and Linear Data Set (LDS). See record-oriented file system. d. DB2 – database. e. JCL - Job Control Language (JCL) is a scripting language used on IBM mainframe operating systems to instruct the Job Entry Subsystem (that is, JES2 or JES3) on how to run a batch program or start a subsystem.
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