ビジュアルメモリ
The [b]VMU[/b], or [b]Visual Memory Unit[/b] is a memory card peripheral for the [[Sega Dreamcast]] [[video game]] home [[game_console|console]]. 

Its official name was changed by [[Sega]] for each of the three key world regions: In Japan is called the [b]Visual Memory System[/b] (VMS), in North America the [b]Visual Memory Unit[/b] (VMU), and in Europe the [b]Visual Memory[/b] (VM).
vmu