The Hermite-Biehler Theorem and its Generalization -- PI Stabilization of Delay-Free Linear Time-Invariant Systems -- PID Stabilization of Delay-Free Linear Time-Invariant Systems -- Preliminary Results for Analyzing Systems with Time Delay -- Stabilization of Time-Delay Systems using a Constant Gain Feedback Controller -- PI Stabilization of First-Order Systems with Time Delay -- PID Stabiliza…