Every file in VSAM has two objects which define this storage system.
File object - File object represents the entire file itself. You can use the method like Delete, Read, Rewrite, Write, Unlock, StartBr and perform those actions.
FileBrowse object - This represents the browse operations in a file. The methods used in this are Enable, ReadNext, ResetBr, ReadPrv and perform these activities on IDCAMS ( Integrated Data Cluster Access Method Services) or TSO prompt.
The IDCAMS is a utility that is used to create, modify or delete the datasets in VSAM. This is an Access Method Service(AMS). It is capable of handling both VSAM and non-VSAM datasets.