Abstract
While the terms Information System and Information Technology are sometimes used interchangeably, they are two distinct concepts. The information system is an organized combination of several entities which stores, retrieves, transforms and disseminates information in an organization like a company. These entities could be people, software, data resources, procedures, hardware or communication network. MSN messenger or AIM are softwares which allow people to communicate with other people live. For example, I am currently in New York and this kind of information system allows me to communicate with my family and my friends who live in France. Information system has been used since the dawn of the civilization, that is why we don't necessarily associate it with computers. Indeed, during the middle ages, they used birds like homing pigeons in order to send messages. It was a system of information. A simple road sign is an information system. Smoke signs are part of the information system and will be more used in bars and restaurants in Europe in order to inform people not to smoke in public places.
