What is the purpose of the expansion slot?

What is Expansion Slot? what is an expansion slot Expansion slots allow hardware not present in the original computer to be added by the pc owner Originally pcs used expanssion boards to what is the ugga bugga slot machine The basic purpose of expansion cards is to enhance the existing abilities of the motherboard The adoption of expansion cards occurred rapidly

what is mail slot There are different kinds of slots available, one is PCI which is a general expansion slot used in the old