* [[Dobbertin Memory Expansion]]
* [[Dobbertin]] [[Universeller EPROM Programmer 4004]]
* [[Inicron RAM-Box]] (Inicron)
* [[RAM BOX]] 512Kb memory expansion
* [[RAM7 2Mb memory expansion]]
* [[Inicron RAM-Box]]
* [[Vortex Expansions RAM card]] ([[Vortex Computersysteme|Vortex]])