In this foundational lecture, we will explore how communication happens inside a computer between its core components: the CPU, memory, and input/output (I/O) devices. You will gain a clear, conceptual understanding of how these components interact, exchange data, and work together to execute programs and process information.

The lecture explains the fundamental principles of how a computer operates as a system of cooperating hardware units. We will walk through data flow, address buses, data buses, control signals, and the basic processes that allow hardware components to work in synchronization. This is not theoretical fluff; this knowledge is critical to understanding why software behaves the way it does when interacting with hardware.