Answer: PC Cards are ejected by a mechanism triggered by a thin bi-metalic wire called NitiNol (Nickel Titanium alloy) which contracts when a voltage is applied to it. This contraction triggers the mechanism to eject the card. If you are having trouble ejecting a PC Card, a paperclip can be inserted into the small hole next to the PCMCIA slot to manually eject the card. Avoid manually pulling the card out of the computer - this could leave the mechanism set in the wrong position.