"The Association of Research Libraries (ARL) is a nonprofit organization of 124 research libraries at comprehensive, research institutions in the US and Canada that share similar research missions, aspirations, and achievements. The Association's importance and distinction is born from its membership and the nature of the institutions represented." (From the ARL website)
View a tabulation of the Automation systems, an Market Share Analysis, a presentation Market Share Trends from 2000-2020, and a tabulation of the Discovery Services used by ARL members.