I will be talking about an article in the March 1995 issue of IEEE Software entitled "Image-Browser Taxonomy and Guidelines for Designers", written by Catherine Plaisant, David Carr and Ben Shneiderman. Here is their summary: Building on user familiarity with one-dimensional scroll bars, many designers simply use two one-dimensional scroll bars when the application requires independent control over the horizontal and vertical directions. This is effective if users frequently move in a single direction by small increments of less than one screen, but in many cases is inadequate. The requirements of more complex applications suggest that more careful analysis, design, and evaluation might lead to significant improvements. Indeed, our exploration of existing 2-D browsers has lead us to identify many features and a wide variety of tasks performed with browsers. Here we introduce ... a task taxonomy, [and] suggest design features and guidelines.