[TUHS] B Language revived on V4 Unix

[Douglas McIlroy via TUHS]

The feature of B that most impressed me was not its size, but the fact
that it could compile (and run!) code that was too big to fit in
memory, thanks to software paging. In particular, when a new feature
caused the compiler to become too big, it could still run. Then it
could be modified to exploit the new features to shrink it back.

So bringing full B up on v4 is nice, but not such a tour de force as
it was on v1.

Doug