Oldest operational computer was Re: cctalk Digest, Vol 54, Issue
dkelvey at hotmail.com
Thu Feb 14 08:52:26 CST 2008
> From: dgriffi at cs.csubak.edu
> On Wed, 13 Feb 2008, dwight elvey wrote:
>> Triodes were made before 1900. If it is just materials but not
>> known, one might use zinc oxide negative resistance devices.
>> Relays are simple enough and well known by then. Output isn't
>> a big issue. Memory is always a problem but input could easily
>> be done with punch cards ( also well known then ).
>> Relays can be use for memory but they are expensive. I've always
>> thought that a bunch of reed relays with small magnets to bias them.
>> Too bad they didn't have reed relays then.
> Is there any reason why reed relays didn't exist then? It's not
> difficult to make them by hand. Making them hermetically sealed, that
> might be tricky.
I didn't say couldn't just didn't exist then. They surely could have
been made, including sealing. Remember, they were making
triode vacuum tubes by then. look up audiotron.
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