If Unix could present the same face, the same capabilities, on machines of many different types, it could serve as a common software environment for all of them.

Thompson and Ritchie were among the first to realize that hardware and compiler technology had become good enough that an entire operating system could be written in C, and by 1978 the whole environment had been successfully ported to several machines of different types.

My go-to prebikini flat-ab move is the plank, all different types.

Different times need different types of leadership.

I get to partner up with all different types of opportunities.

We do need different types of propulsion to get to Mars. I wrote one of the first Ph.D. theses on that in the 1960s.