— This work presents related areas of research, types of data collections that are visualized, technical aspects of generating visualizations, and evaluation methodologies. Existing methods are structured and explained from the aspect of visualization process. Successful applications are noted and some future trends in the field are anticipated. Keywords— Information Visualization, Visual Analytics, Topic Detection and Tracking, Text Mining, Trend Discovery, Visualization Evaluation, Dimensionality Reduction, Text Representation, Information Extraction, User Interaction.