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# 2.5.2 Using the Library

This topic describes the basic architecture of the USB CDC Device Library and provides information and examples on its use.

## Topics

Name | Description
Abstraction Model | Provides an architectural overview of the CDC Function Driver.
Abstract Control Model (ACM) | Describes the various Abstract Control Model (ACM) commands supported by this CDC Function Driver implementation.
Library Overview | The USB CDC Device Library mainly interacts with the system, its clients and function drivers, as shown in the Abstraction Model. The library interface routines are divided into sub-sections, which address one of the blocks or the overall operation of the USB CDC Device Library.
How the Library Works | This section explains the working of the CDC Function Driver Library.