The AquaBrowser Library discovery interface, originally developed by Medialab Solutions, based in Amsterdam in the Netherlands, has been adopted by libraries around the world. AquaBrowser Library provides relevancy-based search results, faceted browsing, a visual cloud of related terms, and a variety of other features that result in a user-friendly interface for searching a library's collection. Although its use in the United States has dwindled, it remains extremely popular in public libraries in the Netherlands.
In December 2012 ProQuest was awarded a contract to adapt AquaBrowser Library as an interface for NBC, including its extension to include digital and electronic materials in addition to the print materials. For libraries already using AquaBrowser as their local catalog, they will be able to make a smooth transition to the NBC+ in conjunction with the AquaBrowser Library (ABL+). AquaBrowser is intended as only one of the interfaces through which the NBC+ collection can be accessed.