Introduction Information Systems

Introduction

Information Systems can be conceptualized in terms of three types of systems:
Transactional Processing Systems (TPS), Management Information Systems (MIS), and Expert
Systems. MIS has several subsets such as Decision Support Systems and Executive Information
Systems. The role of MIS in decision support is best discussed in the context of the subset
referred to as Decision Support System (DSS). A DSS is a computer based system (an
application program) capable of analyzing an organizational (or business) data and then presents
it in a way that helps the user to make business decisions more efficiently and effectively. It is
basically an informational application which depends on the information already input while
answering to a given query. For example, a decision support system could provide