[GreenKeys] Rock and Roll Teletype 'experts'

[Tony Duell]

>
> > Said books also contain a description of a lovely electromechanical FIFO
> > system used to store train descriptors on the London Underground (and its
> > associated binary to 1-of-n decoder) ...
>  
> which I suppose are still in use in the New York subway :-)

Well, I'd rather trust the old electromechananical signalling system than 
any microprocessor-based thing...

-tony