While not considered a true 'multitouch' device, the Nintendo DS had a software system to sense multiple contact points at once. This is used for a puzzle solu

While not considered a true 'multitouch' device, the Nintendo DS had a software system to sense multiple contact points at once. This is used for a puzzle solution in the first Hotel Dusk game. It seems like the cursor would jump between the 2 points at some resolution. I assume many touch screen systems use something similar to filter inadvertent noise such as smudges on capacitive systems.