So the crucial thing for me would be: are the reference docs for may language/library/OS considered external resources? Can I type man in a terminal? Can I use

So the crucial thing for me would be: are the reference docs for may language/library/OS considered external resources? Can I type man in a terminal? Can I use a Python repl to explore the data structures? If so, then, yes, I can. But I had to go double tab on http.server to remember what was in there. I used to commute on a ferry, and was offline for that commute. Often I would do some coding (more often I was writing), and a tool like Dash that put reference docs offline was essential.