[TUHS] unix v4 tape found

[Douglas McIlroy via TUHS]

> I think it would important to credit the authors of
> /usr/sno: SNOBOL III
> /usr/source/s3/fp*.s: Floating point simulator
> /usr/source/s3/qsort.s
> /usr/source/s4/{cos,gamma,hypot,sin}.s: Math library

Lee McMahon wrote qsort.

Bob Morris wrote the math library. It was quite good, with
one exception. When Peter McIlroy redid -lm for BSD,
with freshly derived approximations, he found that Morris's
gamma function was utter nonsense near the poles.

Doug