[TUHS] Etymology of bc(1)

[Dave Horsfall]

On Thu, 11 Sep 2014, Noel Chiappa wrote:

> Which is kind of a hack, but... it does avoid using a second process, 
> although the amount of data that can be passed is limited. (IIRC, a pipe 
> will hold at most 8 blocks, at least on V6.) Did this hack ever get used 
> in anything?

speaking of pipes, wasn't it PWB that imlemented a write of zero bytes to 
mean end of file, or am I thinking of some other version?  For some 
reason, the Harvard shell and friends, including the TTY driver, come to 
mind.

-- Dave