* [[Amstrad Serial Interface]] ([[Amstrad]])
* [[Panda Electronics Communications Interface Unit]] (dual RS232 plus 8bit printer port) (Panda Electronics Ltd)
* [[SCA CPC Prolink]] (single RS232 port) ([[SCA]])
* [[Spectre Comms Serial Interface]] with Cage Comms software ([[Spectre Communications]])
* [[Vortex Disc Drives]] (disc drive/interface with optional RS232 port) ([[Vortex Computersysteme]])
* [[Data Media Disc System]] (disc drive with built-in RS232 interface) ([[Data Media]])
* [[RS-232 para Amstrad]] ([[MHT Ingenieros]])
* [[SCA CPC Prolink]] ([[SCA]])
* [[Dual RS232]] ([[Timatic Systems]])
* [[Unknown RS232 Interfaces]]