VSAM stands for Virtual Storage Access Method. VSAM is a file storage access method used in MVS, ZOS and OS/390 operating systems. It was introduced by IBM in 1970's. It is a high performance access method used to organize data in form of files in Mainframes.
VSAM is used by COBOL and CICS in Mainframes to store and retrieve data. VSAM makes it easier for application programs to execute an input-output operation.
This tutorial is designed for software programmers with a need to understand the VSAM concepts starting from scratch. This tutorial will give you enough understanding on VSAM from where you can take yourself to higher level of expertise.
Before proceeding with this tutorial, you should have a basic understanding of JCL and COBOL. A basic understanding of any of the file handling method will help you in understanding the VSAM concepts and move fast on the learning track.