The term intelligent systems is subject to the level of development of modern computer systems. However, there are some characteristic properties of intelligent systems that are independent of technological development.
Intelligent systems process data electronically and can interpret information and its meaning from data and data sets and link them with each other in a topic-related manner. They are capable of learning, have artificial intelligence, and have cognitive abilities. Other characteristic features are their adaptability to a wide range of tasks and environmental conditions, their fault tolerance and safety.
Intelligent systems are networked and can access other systems: knowledge-based systems, knowledge databases, expert systems and other software solutions.