According to Encyclopaedia Brittanica (http://global.britannica.com/EBchecked/topic/287895/information-system) an 'information system, is an integrated set of components for collecting, storing, and processing data and for delivering information, knowledge, and digital products. Business firms and other organizations rely on information systems to carry out and manage their operations, interact with their customers and suppliers, and compete in the marketplace.'
The Elsevier Information Systems Journal (http://www.journals.elsevier.com/information-systems/) defines information systems as 'the software and hardware systems that support data-intensive applications.'
The ACM Transactions on Information Systems (http://tois.acm.org/index.html) define an information system as 'computer software that helps people find, organize, analyze, and use information in a variety of media.'
Elsevier: Most downloaded information systems articles http://www.journals.elsevier.com/information-systems/most-downloaded-articles
