What is the trunk-modular principle of building a computer?

The architecture of modern personal computers is based on the magical-modular principle. The modular principle allows the consumer to complete the required computer configuration and, if necessary, upgrade it.
The modular organization of a computer is based on the trunk (bus) principle of information exchange between devices. The backbone (system bus) includes three multi-bit buses: the data bus, the address bus and the control spike, which are multi-wire lines.The processor and RAM are connected to the backbone, as well as peripheral input, output and storage devices that exchange information on machine language (sequences of zeros and ones in the form of electrical impulses).

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