I personally am not aware of another any earlier, so if you asked me that
is what I would have said.   I'd be curious if you discover an earlier one
and the story behind it.
ᐧ

On Thu, Apr 15, 2021 at 7:20 AM Lars Brinkhoff <lars@nocrew.org> wrote:

> Hello,
>
> Which was the first C compiler written outside Bell Labs?
>
> I have a candidate in mind.  Alan Snyder interned at Bell Labs in 1973.
> Later at MIT, we wrote a C compiler for the PDP-10.  This would have
> been 1974-1975.
>