This document provides an overview of information systems in business today. It discusses how information systems are transforming business through mobile platforms, big data, and cloud computing. Information systems allow firms to achieve strategic objectives like operational excellence, new products/services, customer intimacy, improved decision making, competitive advantage, and survival. An information system consists of people, procedures, software, hardware, data, and networks that collect, transform, and distribute useful information. Managing information systems requires understanding their organizational, management, and technical dimensions.