This documentation contains information for operating Natural in a UNIX environment. It is organized under the following headings:

Profile Parameter Usage Information on the parameter hierarchy. How to assign profile parameter values statically, dynamically and at runtime.
System Files How system files and Natural objects are stored in the file system. Information on the system files FNAT, FUSER and FDDM.
Work Files How to define work files. Information on the different work file formats.
Natural Buffer Pool How the buffer pool is used by Natural and how it is started.
Using the Buffer Pool Monitor (NATBPMON) How to invoke the NATBPMON utility. Information on the commands that are available with this utility.
Natural in Batch Mode How to run Natural in batch mode. Information on the required input and output channels. How to use batch mode simulation.
Support of Different Character Sets with NATCONV.INI How to define different character sets in the file NATCONV.INI.
Natural Exit Codes Information on the Natural exit codes, including startup errors.
Setting Up the Entire System Server Interface How to activate the Entire System Server Interface for the product Entire System Server.
Tuning SQL Database Access How to configure the handling of the SQL driver's statement table.
User Exit for Computation of Sort Keys - NATUSKnn How to sort characters of other languages in the correct alphabetical order.
Abnormal End (Abend) Handling Information on the signal handlers.

The Natural utilities which can be used to execute numerous administrative functions are described separately; see the Tools and Utilities documentation for detailed information.

Security is also described separately; see the Natural Security documentation for detailed information.