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Note: Re the suggestion that this question is a duplicate of How to understand the Ubuntu file system layout? – This question asks specifically what
usr mean, ie. what English word(s) did they derrive from. Answers to this question may refer to the functions the directories serve, but this is either to help explain the origin of the name, or is just coincidental information.
I can relate to acronyms and abbreviations much more readily when I actually know how they were derrived.
It is oftn pssble to wrk out wht an abrvtion means if you know the the root words behind it... but unfortunately
etc is a standard abbreviation for "et-cetera"... and for
usr I think of "user"... but I can't see any correlation.
Most of the terse names in Linux actually make sense when I finally work out the expanded original normal words behind them..
Are the origins of these abbreviations lost in the mists of time, or are they "obvious" to all but me?
This question was promted by a comment I read yesterday, where someone described these things as Linux incantations ... I sympathize with him :)...