Definition:
An information system can be any organized combination of people, hardware, software, computer networks and data resources that stores and retrieves, transforms, and disseminates information in an organization.

Roles of IS in Business:
There are three fundamental reasons for all business applications of information technology. They are found in the three vital roles that information system can perform for a business enterprise.
 Support of its business processes and operations.
 Support of decision making by its employees and managers.
 Support of its strategies for competitive advantage.

Trends in IS:
The business applications of information systems have expanded significantly over the years.
 Data Processing (1950s – 1960s): Electronic data processing systems which includes transaction processing, record keeping, and traditional accounting applications.
 Management Reporting (1960s – 1970s): Management information systems that include preparation of management reports of pre specified information to support decision making.
 Decision Support (1970s – 1980s): Decision support systems include interactive ad hoc support of managerial decision making process.
 Strategic and End User Support (1980s – 1990s): o End user computing systems: Direct computing support for end user productivity and work group collaboration. o Executive information systems: Critical information for top management. o Expert Systems: Knowledge based expert advice for end users. o Strategic Information Systems: Strategic products and services for competitive advantage.
 Electronic Business and Commerce (1990s – 2000s): o Internet based e-business and e-commerce systems: Web enabled enterprise and global e-business operations and electronic commerce on the internet, intranets, extranets, and other networks.

What is MIS?
 Right Information
 To the