An information system (IS) together as a set of interrelated components working to collect, retrieve, process, store and distribute information to facilitate the planning, management, coordination, analysis and decision making in companies and others are defined Organizations. ” The common concepts for an information system are those in which: ? Computer networks are made of parts of information processing; ? The use of computer networks of companies are, in fact, connected information systems; ? Developing ways of using computer networks in the business includes the design of the basic components of IT systems; ?

The management of information technology emphasizes the quality and value to the economy and security of information systems in an organization. The IS contains information about people, places and facts that help managers make the decisions, to analyze, visualize and solve complex issues and other problems. To use a cycle of three basic activities: input, processing and output. The IS has three basic functions in the organization of a company that the ability is to transform information into knowledge. ? Troubleshooting, by acting to support the proposal of solutions for the managers of enterprises, to; ? Production of knowledge through the collection of information, be difficult to access by other methods would be; ? Providing an awareness on issues of organization and development. There are several definitions for “management information system: ? System of people, equipment, procedures, documents and communications that collects, verifies, processes transactions, processes, stores, retrieves and presents data for use in the planning, budgeting, accounting, control and management processes for various other administrative purposes. ? Systems for the processing of information management decisions; ? Organized method of delivering information from the past, present and future, in terms of internal operations and external intelligence agency. Used to support the tasks of planning, management and operation of an enterprise through the provision of information in the pattern of the time necessary to support the decision-makers; ? Man-machine integrated system that provides information about the functions of the operation, administration and decision-making processes in society support; ? Group of people or a series of manuals and equipment, data processing, the selection, storage, processing and retrieval of data are designed to reduce uncertainties in decision making by providing information at the time of managers to enable them to reduce it efficient manner; ? System for the collection, storage, retrieval and processing of information are used, or by one or more desired to meet executives of their activities; ? Organized method of providing the executive branch of information from the past, present and future on the internal operations of the company and the business environment ? To warn combination of people, facilities, technology, business environment, processes and controls essential to certain transactions in the typical process routines, to the executives, the importance of internal and external events, which provide a basis for intelligent decisions. Types of Information Systems An information system should be high quality information for businesses and provide filtering of levels of decision, or they are divided into stages, depending on the hierarchical levels of functionality, which she and levels of decision that the information should be obtained with a summary for strategic decisions. An information system expresses a fundamental conceptual structure that depends on human resources (end users and experts in SI), hardware (machines and average), software (programs and procedures), data (databases and knowledge bases) and network (channel of communication and support network) to the activity of the input, processing, manufacturing, storage and control of resources lead to convert the data into information products. An information system is an integral part of an organization and is a product of three components: technology, organizations and individuals, if: ? Organizations – An organization is hierarchically structured and shaped. Each organization has a specific culture or basic assumptions, values and methods. An organizations need to build systems to solve problems created by internal and external factors; ? People – people on information from systems on computers in their work. You are required to enter data into the system so that the computer can read it. ? Technology – the technology is the means by which information is processed and organized for use by humans. Computer technology replaces the manual processing and may result in millions and even hundreds of millions of instructions per second. An information system has the characteristics of Information Systems. In the base model of the IS were 5-key resources: people, hardware, software, data and networks. ? Human resources – people are for all information systems that are the end users and experts is needed. ? Hardware resources – all the physical devices in equipment during the processing of information used. ? Software resources, all types of operational instructions called programs, the operation for the management and control of the hardware on the sets of instructions for processing the information. ? Resource Data – more than the raw material is in fact a valuable organizational resources to efficiently manage to reach all end users within an organization to benefit. ? Resource Network – telecommunication networks including the Internet, intranets and extranets that are for success in the operation of all institutions is of crucial importance is an important activity for the success of the system characterized.

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