EntityQ507696· pop 29· linked from 944 articlesQ codeSign in to saveradiotelegraphy message codeConnectionsInternational Civil Aviation OrganizationEntityamateur radioEntitysidebandEntityWARC bandsEntityamateur radio call signEntityNATOConceptInternational Standard Book NumberEntityUTCEntityWikidataEntityaviationEntityGuglielmo MarconiEntityWayback MachineEntityMorse codeEntitypascalEntityGreenwich Mean TimeEntityQR codeConceptInternational Telecommunication UnionEntityOCLC, Inc.EntityMiami-Dade CountyEntityfrequency modulationEntityCategoriesAmateur radioEncodingsMorse codeOperating signalsTelecommunications-related introductions in 1909