telecommunication factor presented with multiple index on sound ray diagram abstract

aphorism applied automation axiom byword call calling catch cell communication components computers daffodil dictum direct duplex electronic electronics epigram folk gnome high industrial line literacy machinery maxim mechanics mechanization moral motto phone phrase platitude plus precept radio repartee robotics saw scholarship schooling science semaphore tech techno telecommunications telegraph telegraphy telephone telephony teleprinter text truism vector wireless wisdom witticism word