This sequential circuit is nominally an ordinary counter, but an additional input allows us to clear the contents of the counter.

This sequential circuit is a combination of a counter and a register.

This sequential circuit is a combination of a counter with clear and a register.

This sequential circuit is similar to a counter register with clear, except that it does not increment unless explicitly instructed to.

This is a combinatorial circuit sometimes in the form of a PROM.

This is a combinatorial circuit sometimes in the form of a PROM.

This is a combinatorial circuit for doing arithmetic and logic operations. The operation can be selected by the value of inputs.

We present our first simple computer, allowing us to make some very simple computations.