BlackBerry has become a critical-systems software company, as its QNX software is the hidden operating system in 275 million cars, running collision warnings, blind-spot detection, adaptive cruise and lane-keep assist. The same technology runs surgical robots, medical devices and factory automation. QNX is now 50% of revenue, and BlackBerry has posted four straight profitable quarters, its first since it competed with the iPhone. It combines meme-stock appeal with real fundamentals. x.com

