[TUHS] unix v4 tape found

[Matt Day via TUHS]

Cool, thanks Angelo.. I got it running easily thanks to your efforts.

At a glance it looks like Fifth Edition to me... all the files are
timestamped June 10 - 12, 1974. Commands present include col, dd, diff,
eqn, glob, lpr, msh, neqn, pwd, spell, and tee -- according to
https://dspinellis.github.io/unix-history-man/man1.html those commands
first appeared in Fifth Edition and were not present in Fourth.

On Fri, Dec 19, 2025 at 6:53 PM Angelo Papenhoff via TUHS <tuhs at tuhs.org>
wrote:

> I extracted it: http://squoze.net/UNIX/v4/
>
> aap
>
> On 19/12/25, Matt Day via TUHS wrote:
> > Rob Ricci updated today on his Mastodon page:
> > > The attempt to read the UNIX V4 tape is underway!
> > > I'm told "there is data" but I honestly don't know what that means yet.
> > -- https://discuss.systems/@ricci/115747843169814700
> > The process is being filmed by a TV news crew and some footage is already
> > available.
> >
> >
> > On Thu, Nov 6, 2025 at 3:42 PM Rob Pike via TUHS <tuhs at tuhs.org> wrote:
> >
> > > https://phanpy.social/#/hachyderm.io/s/115504720323483804
> > >
> > > From mastodon:
> > >
> > > <https://discuss.systems/@ricci>
> > > Rob Ricci
> > > ricci at discuss.systems <https://discuss.systems/@ricci>
> > >
> > > While cleaning a storage room, our staff found this tape containing
> #UNIX
> > > <https://discuss.systems/tags/UNIX> v4 from Bell Labs, circa 1973
> > >
> > > Apparently no other complete copies are known to exist:
> > > gunkies.org/wiki/UNIX_Fourth_E
> > > <https://gunkies.org/wiki/UNIX_Fourth_Edition>
> > >
> > > We have arranged to deliver it to the Computer History Museum
> > >
>