Marshall Breeding has posted a chart detailing the various brands of Integrated Library Systems (ILS) software used by the Association of Research Libraries (ARL).
Most interesting, from my own perspective, is that Voyager and Millennium are the top two systems. I used Voyager for many years, and feel very comfortable with it; I have been working with Millennium for about 9 months, and am still getting used to it.
Note his brief comment about Open Source ILS use within the ARL. I personally think the shift is coming.
