On Fri, 8 Feb 2013 00:03:11 +0000, Lester, Bob wrote:

>    Someone once told me it was "Supervisory Printer Online"

I remember it from my days working with a B1700 series computer as "System 
print out". 
Your link below refers to it as "Supervisory Print Out".  It was the system 
console, and on 
the B1726 that I worked with in the mid-1970's, the mechanism was basically a 
teletype.

>    
> http://bitsavers.informatik.uni-stuttgart.de/pdf/burroughs/B1700/1058294_B1700_SPO_Ctl_jun72.pdf

-- 
Tom Marchant

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