This the first version of a historical Student Information Systems (SIS) graph. An SIS tracks student records in a higher education institution. My first exposure to them was in the 1990s at Assiniboine, when we had to choose between Colleague and Banner, and then went through an excruciating implementation process. Anyhow, the market today is much larger and more varied. The one thing I would want to change with this graph is to indicate how popular each system was, with varying widths for each bar (much the way Feldstein does with his LMS graphs).