I'm already discuss about definition of system earlier. So now I'm going to discuss about types of system in the basis of behavior. There are four types of system in the basis behavior. Those are:

1. Physical or abstract systems
2. Open or closed systems
3. Deterministic or probabilistic systems
4. Man-made information systems

1. Physical or Abstract Systems: A physical system may be defined as a set of elements that operate in relation to each other to accomplish a common objective or purpose. For instance, a computer system is a physical system that consists of a set of electronic equipment which get activate by system of electronics signals to accomplish a processing activity.

2. Open or Closed Systems: An open system is one which exchange information, material or energy with the environment. Biological systems and business organizations are open system. Analysts usually deal with open system. Such interactive systems are adoptive that is, they tend to form a structure to allow them to adopt to changes in their environment in such a way as to continue their existence.

A closed system is defined as one which does not interact with environment. An example of such system is a chemical reaction in a sealed insulated container. Such system are subjects to increase in entropy or disorder.

3. Deterministic or Probabilistic Systems: A deterministic system is defined as one which the interaction among the components is known with certainty and hence the occurrence of all events in it is predictable. A correctly developed computer program; for example, is a deterministic system.

A probabilistic system is an inventory control systems in which the occurrence of events can not be perfectly predictable. An example of such a system is an inventory control system in which the average demand, average time for replacement etc. may be defined, but the exact value of them at a given time is not known.

4. Man-made Information Systems: An information systems are those which receive inputs of data and instruction, maintain files of data about different subsystems and produce information. No business organization can function effectively if it does not make use of information properly. That is why, an information system is often regarded as a separate subsystem.