 The operating system was started from a floppy disk or via a remote boot ROM on its network interface card, connecting to the LAN's fileserver.Stand-alone workstations were rarer but available with either twin floppy drives or a 20Mbyte hard drive and single floppy drive.Mouse - 9 pin D-Sub connector, sometimes confused as a serial port, it uses quadrature signalling
Keyboard - Earlier models - Proprietary keyboard port, Later models - PS/2 keyboard port
Video - 5 pin DIN plug with TTL RGB output compatible with BBC micro monitor connectors - modified CGA output
Parallel - Optional via expansion card - usually with BBC micro 'user port' alongside- both with ribbon pin connectors
Network -BNC connector - Zilog Z-NET, Ethernet expansion cards were available for later models - both allowed network boot
Piconet - a proprietary serial interface for connecting peripherals
Power - Standard IEC connector in and out for monitor supply

The RM Nimbus AX and VX models were launched in 1986 and used the 80286 (later the 80386) processor.