Expension Cards, Slots :

Expension cards controls the peripheral devices such as graphics card, network interface card and sound card etc.

Expension slots is a socket on motherboard where different expension card can be inserted.

Expension Cards. These cards are the printed circuit boards that are fitted into an expension slot. The main purpose of these cards are to improve the capability of the computer. Most frequently used interface cards are:

a) Graphuc card

b) Network interface card

c) Sound card

d) MPEG Decoder

Expension Slot. Expension slots are made on the motherboard where expension cards can be inserted. In most computers four to eight expension slots are available. It is also known as bus slot or expension port.

Expension slots provides an installation point for a hardware expansion card to be connected.