In a nutshell, a IT system is a set of connected components, and its task is to process the entered data victimization technology. Info systems contains the following parts: component - is the basic element of the system, devices wont to store data, communication between individual parts within the system, devices that help in communication between a laptop and an individual's, to receive data from outside - e.g. scanners, cameras, electronic sensors, executive parts, external controls utilized by the pc, processing devices, software, i.e. Operational systems that control info technology, human resources, i.e. staff in operation computers and individual components, and organizational components, i.e. organizational and data elements, or the cognitive content - ticketing system. Exemplary sorts of IT systems supporting enterprises are pace - Business method Management, CRM - customer Relationship Management, MRP - Material needs designing, SCM - provide Chain Management, ERP - Enterprise Relationship Management, ERM - Enterprise Resource designing. IT systems can be easy, however also very difficult, such as banking systems, airport management systems, railway systems.