ABO can exist thanks to the active collaboration of libraries around the globe. The following institutions have contributed digital copies of annotated books in their collections to ABO (see also our conditions of use). We welcome new contributors: please contact us if you are interested.
- Special Collections, University Library, Amsterdam
- Conscience Bibliotheek, Antwerp
- Special Collections, University Library, Cambridge
- Chetham’s Library, Manchester
- Rare Books and Manuscripts Library, Columbia University, New York
- Folger Shakespeare Library, Washington DC
- Special Collections, University Library, Ghent
- General and Special Collections, University Library, Groningen
- Maurits Sabbe Bibliotheek, Katholieke Universiteit Leuven
- Special Collections, University Library, Princeton
- Special Collections and University Archives, Stanford University Libraries
- Earl Gregg Swem Library, The College of William & Mary, Williamsburg
- Special Collections, University Library, Utrecht
- Tresoar, Friesland Historical and Literary Centre, Leeuwarden
- Centre for Reformation and Renaissance Studies, Victoria University in the University of Toronto