+An **Expansion Bus** is a critical pathway within a [computer](/wiki/computer), allowing the central processing unit to communicate with various [peripheral](/wiki/peripheral) devices. It provides slots for adding expansion cards, extending a system's capabilities with new functions.
+## See also
+- [PCI Express](/wiki/pci_express)
+- [Motherboard](/wiki/motherboard)
+- [Data Bus](/wiki/data_bus)
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