>>7,8
C is to Unix as Lisp is to Lisp Machines. Unix defines the original C `style' and programming environment. The core of Windows is the ultimate example of how to implement a system in C without actually following any of its core conventions (handwritten function tables vs. COM, shared objects vs. DLLs, etc).
Also, keep in mind that operating systems written in a low level language (like CP/M) were still in vogue when
>>1 was recorded. The idea of having a microcomputer operating system written (almost) entirely in a high level language was a really untested concept at the time.