About This Guide

The System Architecture guide accompanies the QNX operating system and is intended for both application developers and end-users.

This guide provides a detailed look at the structure and functions of QNX. It describes the Microkernel, System Managers, as well as QNX's unique message-based IPC. We recommend that you read this guide before you begin using QNX.

For information on installing and using QNX, refer to the Installation & Configuration guide.

The System Architecture guide contains the following chapters:

• The Philosophy of QNX
• The Microkernel
• The Process Manager
• I/O Namespace
• The Filesystem Manager
• The Device Manager
• The Network Manager
• The Photon microGUI Windowing System