[TUHS] Shell control through external commands

[Sven Mascheck]

Sven Mascheck wrote:
> Joerg Schilling wrote:

> > > > The colon was introduced by AT&T around 1983.
> [...]
> I'm still confused (you're short with context): what does "introduced by AT&T" mean?

Ok, so they included csh with SysV, but SVR1 had no #! yet.
Less confused but still curious: what problems did show up with : then?

-Sven