[codetrotter]

I think they meant to say that BSD-based stuff is common but unknown to most, and that the same goes for VxWorks and TRON, in that both open source BSD and proprietary solutions have licenses that make their inclusion in other software products not noticed by many people.

[tomxor]

Same for Minix3... until someone dug it out of IntelME no one knew it was one of the most ubiquitous deployed OS.