ExpressCard is an Interface card!
It allows peripheral devices can be connected to Computer usually Laptop are used.
This card contains electronic circuitry and connects to external devices and this card is also known as PCMCIA.
few devices which can be connected to Computer using ExpressCard are
- Connect cards,
- Firewire 1394B,
- USB 2.0
- USB 3.0
- Serial ATA,
- Solid state drives
- TV turner
Official Site HERE