IBM 7074 and then some: "Systems we love" conference

Jon Elson elson at
Tue Jan 24 21:55:37 CST 2017

On 01/24/2017 08:57 PM, Chuck Guzis wrote:
> On 01/24/2017 06:37 PM, Jon Elson wrote:
>> On 01/24/2017 12:38 PM, Chuck Guzis wrote:
>>> Was the 7070 IBM's first machine with a wire-wrapped backplane?
>>> --Chuck
>> No, all SMS machines used similar wire wrapping.  So, I think that
>> goes back to the 7030 (Stretch) and probably 1620, 1401 and others of
>> that time.  I'm pretty sure those preceded the 70xx series.
> The 7070 was very early (1958) and is probably the first (or close to
> the first) IBM transistorized computer.  The 1620 and 1401 were both
> 1959 introductions.  First delivery of STRETCH to LANL was 1961.
Well, they were all built using SMS card technology, and a 
few pictures seem to show very similar backplane setup.
I didn't know the 7070 was the first of that generation.  
While the first 7030 was delivered after the 7070, 
development of the Stretch probably started first.


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