Real-time systems are specially designed computers that are SUPPOSED to monitor, respond to, or control an external environment, connected to the computer system through sensors, actuators, and other input-output interfaces. These environments generally consist of physical or biological objects of any form and structure. Sometimes humans are part of the connected as an external world, but a wide range of other natural and artificial objects, as well as animals, are also possible in this system. These computer systems must meet various TIMING and other constraints that are IMPOSED on it by the real-time behavior of the external world for which it is interfaced. That’s why it is known as real time. Another name for these systems is REACTIVE systems; because their primary purpose is to react to signals from their environment. A real-time computer system may be a component of a larger system in which it is EMBEDDED; reasonably, such a computer component and is called as an embedded system.

Real-time systems are specially designed computers that are supposed to monitor, respond to, or control an external environment, connected to the computer system through sensors, actuators, and other input-output interfaces. These environments generally consist of physical or biological objects of any form and structure. Sometimes humans are part of the connected as an external world, but a wide range of other natural and artificial objects, as well as animals, are also possible in this system. These computer systems must meet various timing and other constraints that are imposed on it by the real-time behavior of the external world for which it is interfaced. That’s why it is known as real time. Another name for these systems is reactive systems; because their primary purpose is to react to signals from their environment. A real-time computer system may be a component of a larger system in which it is embedded; reasonably, such a computer component and is called as an embedded system.