AGP
Its AMR Audio/Modem/Riser Card.
PCI Express
AGP was the most common before the PCI Express
pci express (PCIe)
pci express or AGP
bus
PCI or PCI Express
expansion slot
PCI Express X16 or AGP 8X..
MCA
MCA
The original IBM compatible parts used an 8-bit ISA slot. After that, they moved to a 16-bit ISA slot. There were other things like a VESA slot that didn't last for long. Then there were PCI slots (not express), and AGP was a faster video card slot standard. Then PCI-express replaced both PCI and AGP.