When did you hear for the first time about in memory systems? Today? Last year? 1982?
For me it was the latter. In 1982 I was invited to work with students at bremen university on developing a new type of computer programmes. We were still working with card readers, where a machine punches holes in cardboard strips to store binary information. The idea was to load data into a more permanent form of memory called EPROM (erasable programable read only memory). The issue was that at that time EPROM was used for permanent data to help a device start up correctly. Operating systems were to follow, but freely dipping in and out of that memory was not great ( as the name ReAd Only Memory indicated.