The Microram was a multipurpose solid state memory chassis sold by EMM 
(Electronic Memories and Magnetics) with what we called later in the 1970's a 
"personality board" that plugged it into each different CPU's backplane.  They 
sold a similar system (maybe even plug compatible at some level) with core 
planes under "Micromemory" brand name. I see we already have a "emm" directory 
in bitsavers with docs about some of their core products.

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