Modeling of information is necessary in developing information systems. Information is acquired from many sources, by using various methods and tools. It must be recognized, conceptualized and conceptually organized efficiently, so that users can easily understand and use it. Modeling is needed to understand, explain, organize, predict and reason on information. It also helps to master the role and functions of components of information systems. Modeling can be performed with many different purposes in mind, at different levels and by using different notions and different background theories. It can be made by emphasizing users' conceptual understanding of information on a domain level, on an algorithmic level or on representation levels. On each level, the objects and structures used on them are different and different rules govern the behavior on them. Therefore the notions, rules, theories, languages and methods for modeling on different levels are also different. It will be useful if we can develop theories and methodologies for modeling to be used in different situations, because databases, knowledge bases and repositories in knowledge management systems, developed on the basis of models and used to technically store information, are growing day by day. In this publication, the interest is focused on modeling of information and one of the central topics is modeling of time. Scientific and technical papers of high quality are brought together in this book.