Yes they are. But they also claim to have written and maintain a RTOS, a C++20-supporting compiler, to have worked with Nintendo, ARM and the DoD, and on Boein

Yes they are. But they also claim to have written and maintain a RTOS, a C++20-supporting compiler, to have worked with Nintendo, ARM and the DoD, and on Boeing software. And they seem to have invented or at least implemented a time travel debugger six years before GDB. https://en.wikipedia.org/wiki/Green_Hills_Software https://en.wikipedia.org/wiki/Green_Hills_Software https://www.ghs.com/ https://www.ghs.com/