5 Aug
2008
5 Aug
'08
1:51 a.m.
On 4 Aug 2008 at 23:26, Eric wrote:
The correct Sigma device(s) consisted of, for example,
the Sigma 5,
Sigma 7, and Sigma 9 (was there a Sigma 2?) made by Scientific Data
Systems (SDS), which was bought out by Xerox in 1969 and subsequently
named Xerox Data Systems (XDS).
Then, after Xerox abandoned the mainfame industry (circa 1974) --
Honeywell came into the picture and provided service engineering
contracts and maintenance for their products and existing clients.
In other words, the OP is looking out for mainframe type products (or
minicomputer computer products, depending on your definition of
exactly what defines a mainframe vs. minicomputer in this context :-)
Boy, that name goes back quite a ways My friends at Lockheed (LMSC)
in Sunnyvale used a couple of those in the 1970s. SDS->XDS is right.
Here's some more information on the SDS machines:
http://www.andrews.edu/~calkins/profess/SDSigma7.htm
Cheers,
Chuck