Alternatively referred to as a bus slot or expansion port, an expansion slot is an opening located inside a computer on the motherboard or riser board that allows additional boards to be connected to it. For example, if you wanted to install a new video card in the computer you'd purchase a video expansion card and install that card into the compatible expansion slot. Below is a listing of some of the expansion slots commonly found in IBM compatible computers as well as other brands of computers and the devices commonly associated with those slots. Clicking on any of the links below give you additional details about each expansion slot.
Computer expansion slots
- AGP - Video card
- AMR - Modem, Sound card
- CNR - Modem, Network card, Sound card
- EISA - SCSI, Network card, Video card
- ISA - Network card, Sound card, Video card
- PCI - Network card, SCSI, Sound card, Video card
- PCIe - Video card
- VESA - Video card
Many of the above expansion card slots are obsolete. You're most likely only going to encounter AGP, PCI, and PCIe when working with computers today. In the picture below, is an example of what expansion slots may look like on a motherboard. In this picture, there are three different types of expansion slots; PCI Express, PCI, and AGP.