Informatics is the interdisciplinary study of the design, application, and impact of information technology. It encompasses disciplines like artificial intelligence, cognitive science, and computer science. Information systems involve the use of hardware, software, and networks to collect, process, and distribute data within organizations. They provide important functions like communication, operations, decision-making, records keeping, and more. There are different types of information systems such as decision support systems, transaction processing systems, expert systems, management information systems, and others.