[rberger]

My first job was at the startup Micro-bit in the mid 1970's We were building Electron Beam Access Memory systems as a "Cache" memory between Core and Disk memory for mainframes.

It was an 18 bit wide memory so it had 18 CRT tubes and was leveraging electron microscope techniques to increase density. It had two steps of electron beam steering.

I remember the founder walking around talking about our main competitor "Bubble Memory" which also never got very far.

http://www.computer.org/csdl/mags/co/1975/02/01649340.pdf