Thanks a lot for all your responses. They helped and encouraged me.

[2015-05-18 11:06] Clem Cole <clemc at ccc.com>
>
> I thought it came from USG, as it was definitely in PWB 3.0 [which was
> "rebranded" as System III post break-up], I think it may have been in PWB 2.0.
>   Mashey might remember.   I'll check any doc I have at home tonight, but do
> not think I still have PWB 2.0 bits anywhere.  I think Warren has a TAR image
> from Henry of the PWB 1.0 which to check.


This is what I found out so far:

1) cut was part of System III. The sources are online:
http://minnie.tuhs.org/cgi-bin/utree.pl?file=SysIII/usr/src/cmd/cut.c
In consequence, cut was part of PWB 3.0, as well, because that's
the same.

2) These sources of (presumely) PWB 1.0 show no signs of cut:
http://minnie.tuhs.org/Archive/PDP-11/Distributions/usdl/

3) I couldn't find any sources or useful documentation about PWB 2.0.

4) I've discovered that cut was present in CB Unix 2.1 (which I
haven't even known it existed. ;-) ). I found scanned man pages,
which date November 1979:
ftp://sunsite.icm.edu.pl/pub/unix/UnixArchive/PDP-11/Distributions/other/CB_Unix/cbunix_man1_02.pdf
(cut is on PDF page 57)
Unfortunately, I wasn't able to find sources or, actually, much
useful information at all on CB Unix.


Possibly, you can help me a further step from this point on.

I think, interesting would be sources or docs about PWB 2.0 and
CB Unix and the relation i.e. code transfer between PWB and CB Unix.


meillo