HASTAC is a virtual university. It is a voluntary international network that spans disciplines, institutions, the boundary of higher education and K-12, libraries, museums and other civic and community institutions. It includes top research universities, underfunded community colleges, HBCU's and other minority-serving institutions, as well as supercomputing centers, grid computing centers and major scientific research labs in the U.S. and abroad. HASTAC is pronounced "haystack" and is an acronym for Humanities, Arts, Science and Technology Advanced Collaboratory. Since 2003, HASTAC has been developing tools for multimedia archiving and social interaction, gaming environments for teaching, innovative educational programs in information science and information studies, virtual museums and other digital projects. HASTAC leaders have served as consultants to U.S. and international organizations and governments on grid computing and cyberinfrastructure.

In 2006-07, over eighty HASTAC centers worked together to produce courses, seminars, workshops and public events on the theme of "In|Formation." Topics in that theme were: InCommon, Interplay, InCommunity, Interaction, Injustice, Integration, Interface and Innovation. The project for 2007-08 is a series of ad hoc podcast Town Halls on any topic of social and political importance to new technologies. All podcasts will be advertised and archived on the HASTAC website. In addition, in 2007-08, HASTAC will host the Digital Media and Learning Competition, a $2 million competition sponsored by the John D. and Catherine T. MacArthur Foundation as part of its initiative on Digital Media and Learning. To become part of HASTAC, simply register to the http://www.hastac.org/ website and contribute.

Cathy Davidson and David Theo Goldberg are cofounders of HASTAC.