The OS as a team of processes

The QNX Neutrino OS consists of a small microkernel managing a group of cooperating processes. As the following illustration shows, the structure looks more like a team than a hierarchy, as several players of equal rank interact with each other through the coordinating kernel.

Figure showing Microkernel and system processes.

QNX Neutrino acts as a kind of software bus that lets you dynamically plug in/out OS modules whenever they're needed.