This documentation provides an overview of the Natural database management system interfaces and a short summary of their functions.

The following topics are covered:

Natural for DB2	The Natural interface to DB2 enables Natural users to access data in a DB2 database. Natural for DB2 is supported under the TP monitors Com-plete, CICS, IMS TM, in batch mode, and TSO.
Natural for VSAM	The Natural interface to VSAM enables Natural users to access data stored in VSAM files.
Natural for DL/I	The Natural interface to DL/I enables Natural users to access and update data stored in a DL/I database. The Natural user can be executing in batch mode or under the control of the TP monitor CICS or IMS TM.