AGP was designed to provide a faster interface than PCI for graphics cards. Graphics cards were needing to move more data than the PCI bus could handle. AGP is now obsolete, as data throughput...
agp slots
Yes. AGP stands for Accelerated Graphics Port. http://computer.howstuffworks.com/agp1.htm
This is commonly called AGP and is just one type of interface used for video card connection to computer equipment.
The VGA port is used to connect a monitor to a computer. VGA is an older version of DVI and HDMI