PCI
The expansion card called the host adapter is responsible for managing all devices on the SCSI bus. SCSI is a peer to peer interface
Host Adapter
i/o card
The host adapter is assigned SCSI ID 7, which has the highest priority over all other devices.
i/o card
The expansion slot is the socket on the motherboard that can hold an adapter card. There are different types of expansion slots (pci, pcie, pciex16) so you need to check that the expansion is the same kind as the adapter card.
An adapter card is an internal card that enables your computer to communicate with another peripheral such as a monitor.
Modem
A video card or video adapter translates binary data into images.
Only graphics cards are inserted into a PCIe x16 expansion slot.
A video display (aiso called a video card,display card ,graphic card,graphic board, display adapter or graphics adapter) is an expansion card which generates a feed of output images to a display.Most vidio cards after various function such as accelerater rendering of 3d scenes and 2d graphics ,mpeg.2/mpeg-4 decoding,tv output.
There are several different expansion slots that are compatible with video adapter cards. PCI, AGP, and PCI-Express x1 are all formats that are rarely used these days. The most popular format at the moment is PCI-Express x16.