* [[CPC4MB| CPC4MB - 4 MB memory expansion]]
* [[Data Media SP64]]
* [[Dk'tronics memory expansion|Dk'tronics RAM Memory Expansions]] ([[Dk'tronics]])* [[Dk'tronics Expansion and Silicon Disc]] ([[Dk'tronics]])
* [[Dobbertin Memory Expansion]] ([[Dobbertin]])
* [[Inicron RAM-Box]] (Inicron)