Digital Logic
Digital logic is about circuitry and logic based operations. this is a crucial subject especially to computer science students early on because of the logic paradigm. Digital, or boolean, logic is the fundamental concept underpinning all modern computer systems. Put simply, it's the system of rules that allow us to make extremely complicated decisions based on relatively simple "yes/no" questions.
Digital logic circuits can be broken down into two subcategories- combinational and sequential. Combinational logic changes "instantly"- the output of the circuit responds as soon as the input changes (with some delay, of course, since the propagation of the signal through the circuit elements takes a little time). Sequential circuits have a clock signal, and changes propagate through stages of the circuit on edges of the clock.Typically, a sequential circuit will be built up of blocks of combinational logic separated by memory elements that are activated by a clock signal.