EntityQ1665138· pop 6· linked from 293 articlesInstitute for Defense AnalysesSign in to saveAmerican national security analysis nonprofitConnectionsNASAConceptnonprofit organizationEntityUnited States Department of DefenseConceptDefense Advanced Research Projects AgencyEntityUnited States Department of Homeland SecurityEntityWashington, D.C.EntityWorld War IIConceptHarry S. TrumanEntityDwight D. EisenhowerPersonVietnam WarConceptInternational Standard Book NumberEntityWayback MachineEntityMassachusetts Institute of TechnologyEntityStanford UniversityEntitycryptographyEntityPrinceton UniversityEntityColumbia UniversityEntityDonald KnuthEntitycomputer securityEntityCalifornia Institute of TechnologyEntityCategories1956 establishments in VirginiaFederally Funded Research and Development CentersNon-profit organizations based in Alexandria, VirginiaResearch institutes established in 1956Research institutes in VirginiaThink tanks based in Washington, D.C.