Pervasive information systems are defined as information systems that accommodate user wants and needs in physical environment. With technological advancements in communication technologies, pervasive information systems encompass a dynamic, complex environment consisting of various artifacts instead of personal computers. These systems can perceive contextual information as compared to the simple user input, and thus support mobility instead of stationary services. Pervasive informatics is a branch of ubiquitous or pervasive computing which focuses on information processing. It analyses the nature of information by examining transformations and representations, using computing technologies such as intelligent control systems and smart devices. Pervasive information systems are advantageous as they perform generic tasks, are focused on experience and delivery, virtual and tangible, and provide proactive responses.