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53:00 Module 14 Module 14	Module 14 atmosphere c.w. meter highways radio geography motorsport systems theory caption_complete low power rescue emergency concepts in physics measurement republics d.x. u.h.f. rotation member states of the united nations and air conditioning broadcast engineering security sociology of culture electric power navigational equipment people frequency encodings bus transport grid square liberal democracies space sun thirteen colonies physical layer protocols south america internet social networking services slavic telegraphy t.v. dropfolder digital technology wi-fi space stations heating thing length u.h.f.. f.d.a. emergency services communication community measuring instruments communication theory operator american radio relay league telecommunications wire antenna radio spectrum certificate plasma physics stars space technology media formats direction continents amateur radio fire space plasmas electronic circuits solar phenomena wireless networking hippie movement emergency management electronics terminology computer networks road transport talking hospitals sociology index antenna maps nasa computer science ventilating radio electronics film and video technology v.h.f. satellite rescue equipment radio frequency antenna types types of organization human spaceflight acoustics si derived units information theory websites broadcasting mass media telecommunications equipment From David Kerven
01:19:12 Module 13 Module 13	Module 13 ecology technology systems electronics terminology computer networks n.h.s. brevity codes wireless locating c.b. telephony call sign radio legal procedure panama city telecommunications c.b.s. morse code sociology radio spectrum c.q. sustainable development telegraphy oral communication physical layer protocols radio communications broadcasting health q.s.l. sociological terminology radio electronics k.j. caption_complete radio operator v.h.f. song recordings produced by brendan o'brien repeater making contact h.f. amateur radio office equipment dropfolder mobile technology wireless stars h.s. u.h.f. cell phone full quieting pragmatics city repeater big time broadcast engineering towers f.c.c. sound cards q.s.o. new media g.p.s. telecommunications equipment metaphors From David Kerven