SAGE (System for Automated Graphics and Explanation) is a mixed-initiative presentation system that supports visualization creation. Inputs are a characterization of the information to be visualized and a user's information viewing goals. Design operations include selecting techniques based on expressiveness and effectiveness criteria, and composing and laying out graphics appropriate to information and goals.

This website can be categorized into more than one of Bruce/Levin categories. This website is designed to develop tools that empower people to understand, explore, harness, and create information. Therefore, it can be categorized into 1) Media for inquiry - Theory Building – Visualization software, 2) Media for Inquiry – Data analysis – Programs to make tables and graphs, 3) Media for communication – Document preparation – Graphics, 4) Media for communication – Document preparation - Presentation graphics, and 5) Media for construction – Construction of graphs and charts.