This study presents quantitative and qualitative assessments of the content of communications in the forum discussions on Jihadist websites that are of most concern to U.S. counterterrorism efforts. The study’s findings show that most Jihadist online forum discussions are brief, involve few participants from the registered forum members, and include few entries and pages. Forum participants often refer viewers to an approved website and share genuine Jihadist multimedia. References and quotes from religious sources are common.