The authors study the stability of nonlinear impulsive delay differential systems in the form
By employing the Razumikhin technique and the Lyapunov function method, they obtain sufficient conditions for the trivial solution to be globally exponentially stable. Criteria for the global exponential stability of a linear impulsive delay system are derived as applications. An example and its simulation are given to illustrate the results. This nice paper will be of interest to the researchers working on impulsive differential equations and on the stability theory.