The history of Unix systems and their main components.

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Regex `/pattern/g` and ed `:g/pattern/`: which came first, and why `g`?

The g option (e.g. s/pattern/replacement/g) for many tools that use regex-style pattern matching and the :g command in ed/ex/vi/vim have pretty similar usage and meaning: match the given regex ...
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Presentation Tools Back In The Day

I'm unsure on which Stack Exchange site this question is supposed to be asked, but since I'm especially interested in answers concerning Unix/Linux I think I'm in the right place. So: Which tools ...
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When was the threading implemented in unix?

Which is the first Unix version or Linux version which implemented threads. And in which version bound and unbound threads were implemented? I know that in current Linux version threads are unbound by ...
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Why BitchX is called BitchX?

Well, the title is pretty much self-explanatory, but for sake of completeness, I'm curious to know the reason for the name of BitchX. I searched on internet for etymology but it was a fail. I hope ...