Ada has an important role in the real-time/embedded/safety-critical areas. It is the only ISO-standard, object-oriented, concurrent, real-time programming language. Ada is used as a usual language for application areas such as defense embedded systems that reliability and efficiency are very essential. One of the main Ada’s characteristics in compare with other programming languages is that, Ada was developed from the ground up with capabilities that provide real-time requirements. In this study it will be shown why Ada is used as the new standard for real-time programming languages and basic characteristics of real-time programming system in general and how they are addressed in Ada will be explained.