This documentation describes the powerful and flexible set of Adabas direct call commands for performing database operations. These call commands provide a direct interface to the Adabas database when Natural or another fourth-generation database language is not being used.

The Adabas Command Reference Guide documentation is organized in the following parts:

Overview	Provides an overview of Adabas commands and some general programming considerations when making Adabas calls.
Calling Adabas	Describes the calling procedures for Adabas commands for both the ACB and ACBX interfaces.
Adabas Control Block Structures	Describes the Adabas control block (ACB and ACBX) structures you can use when making calls to Adabas.
Adabas Buffer Descriptions (ABDs)	Describes the structure and use of Adabas buffer descriptions (ABDs) when making ACBX interface calls to Adabas. ABDs are only supported in Adabas 8 and later releases.
Defining Buffers	Describes the creation and use of buffer definitions when making calls to Adabas.
Commands	Provides a detailed description of each Adabas command you can use in an Adabas call.
Programming Examples	Provides programming examples of Adabas calls in a variety of host languages.