EntityQ1607417· pop 13· linked from 76 articlesvertical searchSign in to savesearch engine focusing on a specific segment of online contentConnectionsGoogleOrganizationWorld Wide WebEntityYahooEntityForbesEntityLibrary of CongressEntitysearch engineEntityDark webConceptDefense Advanced Research Projects AgencyEntityweb crawlerEntitydeep webEntityWiredEntitybreadth-first searchEntityontologyEntityYelpEntityCiteSeerXEntitySearch engine indexingEntityEnterprise searchEntityJohn BattelleEntityCategoriesDomain-specific search enginesInternet search engines