imitation game movie

Chuck Guzis cclist at
Wed Feb 11 00:38:59 CST 2015

On 02/10/2015 09:56 PM, Jon Elson wrote:

> Oh, absolutely!  There was a lot of work on using ferrite rings as storage
> and logic elements at that time, but Forrester and Papian really
> extended what had been done before, and the coincident current
> scheme was really ELEGANT and made large arrays of fast memory
> practical.  The bigger you built the array, the more memory you got
> with small increments in the number of drivers.

Didn't coincident-current relays come before that (as used, for example, 
in telephone switching equipment)?  So the basic idea was there.

I've always been fascinated by magnetic core logic; both using "hard" 
magnetics (e.g. Univac SS) and "soft" (e.g. Parametrons).  I wonder if 
magnetic core for memory hadn't been developed, would we have developed 
electrostatic or some other technology to the same density?

Would we have developed ultra-fast recirculating memory?


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