The RML 380z was before the BBC model B in schools. It usually was the first computer in the school. You had 4 addressable disc areas (the top and bottom of a disc having seperate drive letters. You had to load the operation system off floppy and depending on which version of Basicsg2 you ran you got a maximum of 48k for your program.
It was know as the 380z not because it looked like a datsun of the times but used a zilog 380 chip as it's cpu. You could jump immediately into the frontend and program directly in hexadecimal using the z80 assembly language.
It's monochrome monitor was green screen and there was no mouse (the good old days of command prompts - there are times I really miss them days).
