I am not sure about that. POSIX has some benefits, and its features are commonly used; however, there are also some problems. There are other operating system

I am not sure about that. POSIX has some benefits, and its features are commonly used; however, there are also some problems. There are other operating system specifications too, but I also wanted to make one operating system design, and I also wanted to avoid many of the problems with POSIX. I did not konw that POSIX says that 2100 is a leap year, and clearly that is no good.