Mainframes over the weekend

MAINFRAMES are not as ubiquitious today as in the past, but they still play a significant role in several industries. They handle large-scale, data-intensive workloads and process huge amounts of data fast. They are often used for high-volume transaction processing, batch-processing, datawarehousing and analytics. Modern mainframes can run multiple OSes simultaneously and support cloud computing and virtual environments. Mainframes play a significant role in Banking and Financial a COBOLreas. COBOL COBOL is the best programming language that uses side by side with mainframe computing COBOL is essential for the global economy because most financial applications run on a mainframe system with COBOL as a backend. JCL To complete a task in the mainframe environment, a set of instructions should provide to the mainframe. The set of instructions are like - what program to execute, from where the program runs, all all other parameter information. These sets of instructions are coded using the JCL control statements. JCL(Job Control Language)is a programming language used on IBM Mainframe operating system. JCL is a language with a set of predefined instructions that are used by the JOB ENTRY SUBSYSTEM(JES3) to instruct the system on how to run a batch job or start a subsystem. VSAM Virtual Storage access method refers to both type of the dataset and the access methods that are used to manage various dataset types. The access method makes na I/O operation(moving data between an I/O device and memory) easier for an application. VSAM is a type of record-oriented system and an IBM invented access method that allows us to access and organize records in the dataset. CICS CICS stands for "Customer Information Control System". CICS is a online Transaction Processing System. It provides online transaction management and connectivity..