A bit of trivia: what does usr stand for?

[Kevin D. Kinsey, DaleCo, S.P.]

Colin Percival wrote:

> At 18:04 20/12/2003 -0500, Bill Moran wrote:
>
>> Colin Percival wrote:
>> > There's an urban myth floating around that it meant Unix System 
>> Resource.
>>
>>> According to denizens of afc, this is likely a backronym, since the 
>>> first
>>> use of /usr/ was to store user's files.
>>
>>
>> The urban myth is believeable, though, since it seems silly to 
>> abbreviate
>> "user" with "usr" ... I mean, you're only saving 1 letter.
>
>
>   The same could be said about /tmp.  I suspect it has less to do with
> abbreviation, and more to do with someone having a broken "e" key on 
> their
> keyboard. ;)
>
> Colin Percival
>
UNIX is a tad famous for "lazy typists"; Ritchie
has been quoted (I think) as saying Thompson
had a grand penchant for brevity or sparseness.

Could it be related to storage issues?  Three
chars and a slash isn't a biggie anymore, but
back then, ??  Somebody smarter than me might
know....