The IISH collections comprise archive, library and audio-visual material with a thematic emphasis on social and emancipatory movements. The institute holds over 3,000 archives, more than 1,000,000 printed volumes, and a equivalent number of audio-visual items.
The HTA publishes high quality articles, books, essays, documents, historical photos, and links, screened for content, for a broad range of historical subjects. It was founded in 1990 in Mississippi and is one of the oldest history sites on the Internet. This site is dynamic with regular additions to its contents and its link collection.