PCMCIA cards, or PC cards as they are commonly known, were designed originally for adding memory to portable computers, but are now used in a variety of devices.
Yes most card readers will read both formats, with the exception of some early models
Type III
mastercard or visa
Yes, two type I or type II cards can fit into a single type III slot and both cards can work at the same time.
No. A PC Card is a small card slot that is usually found on a notebook. It is really rare that it is on a desktop or tower computer. An express card is a type of a PCI card that fits in a slot in the motherboard.
yes
ExpressCards are not backwards compatible with CardBus or PC Card
No. Only one card will fit in the slot at one time. SOME type 1 cards will work in type 2 slots, but it is best not to do that. You can damage the motherboard by using the wrong type card in a slot.
your PC card should be connected with a USB wire
No.
5.0/5.5 mm thick
A "PC Card" (originally called a "PCMCIA Card")