What is expansion card, expansion slot, and history, internal modem and, book

In computing, the expansion card is a printed circuit board
that can be inserted into expansion slot, on a
computer motherboard to add functionality to a computer
system via the expansion bus.
• It is also known as add on card, expansion board, adapter
card or accessory card.

Types of expansion card

1. interface Card (ATA, Bluetooth, EIDE, Firewire, IDE, Parallel, RAID, SCSI,
   Serial, and USB)

2. Internal Modem
3. Network card
4. MPEG Decoder
5. Sound Card
6. Video capture card
7. Video Card

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