QNX

QNX is a commercial Unix-like real-time operating system built around a microkernel design. It was founded in 1980 as Quantum Software Systems by Gordon Bell and Dan Dodge, two University of Waterloo students who believed there was a market for a small, message-passing real-time kernel. The earliest version, QUNIX, was renamed QNX after AT&T objected; later major releases (QNX 4, QNX Neutrino, QNX SDP) progressively rebuilt the kernel while keeping the architectural principle that almost everything outside scheduling and IPC -- drivers, filesystems, networking, the graphical layer -- runs as a user-space process communicating through synchronous message passing. That design buys QNX two properties prized in embedded systems: a tiny trusted computing base and the ability for a misbehaving driver or service to be restarted without crashing the system. Those properties found a market in industrial control, medical devices, nuclear plant monitoring, and -- decisively -- automotive infotainment and instrument clusters. Harman International acquired QNX Software Systems in 2004 and integrated it into automotive head units. On April 9, 2010 Research In Motion (later renamed BlackBerry) bought QNX from Harman; QNX briefly powered the BlackBerry PlayBook tablet and the BlackBerry 10 phone OS, but the more durable bet turned out to be cars. As of late 2025 BlackBerry reports QNX embedded in more than 275 million vehicles worldwide, where it underpins digital cockpits, ADAS domains, and in-vehicle infotainment for most major automakers. QNX is one of the clearest production demonstrations that microkernel architecture, when targeted at the right market, can be both technically and commercially successful.