I disagree. BSD UNIX, created way back in 1977, was already dominant in Internet networking in those early web days circa 1991, hosting the majority of univers

I disagree. BSD UNIX, created way back in 1977, was already dominant in Internet networking in those early web days circa 1991, hosting the majority of university web content in the early days of the web (early 1990s). And back then, university-hosted content was basically all the web. Sure, strictly speaking, the web was born on NeXTStep, but it definitely was suckled on BSD UNIX, and to a lesser extent System V UNIX, some of the others you mention[1], and VMS (what I used to host web content in the early early days). 1. with the exception of MS-DOS/Windows, which didn't even have native TCP/IP support in those days.