Adapter Card :- A adapter card is also known as Expansion card.Expansion card are used to increase the capabilities of the computer.expansion card can only be installed in expansion slot that are embedded on motherboard.every Expansion card has different function depends on the which one card has been installed by user or on user's requirement.There are many types of Expansion card playing important role in the computer field.
Here is information about some common used expansion card.

• Vedio Card
• Network Card
• Modem
• Sound Card