Oldest national broadcasting system searching

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Keyword	CPC	PCC	Volume	Length string	Score
oldest national broadcasting system	0.43	0.6	8140	35	80
world's oldest national broadcasting system	1.74	0.9	9117	43	62
what is the oldest broadcasting network	0.64	0.2	2016	39	83
the oldest broadcast network is	1.37	0.1	3392	31	9
oldest broadcasting company in the world	1.44	0.8	454	40	11
national broadcast system today	0.09	0.2	8318	31	17
national broadcasting system news	1.69	0.2	1042	33	14
national broadcasting company history	1.3	0.1	6266	37	7
who started the first broadcasting system	0.87	0.8	5032	41	20
broadcasting history in the united states	1.97	0.2	3211	41	22
the history of broadcasting	0.09	0.2	6476	27	90
what was the first live national broadcast	1.24	1	3624	42	69
radio broadcasting stations history	1.4	0.2	4769	35	21
oldest tv stations in america	1.35	0.8	2995	29	77
first a national broadcast	1.28	0.9	4044	26	75
history of american broadcasting	1.9	0.5	9943	32	57
history of radio broadcasting	1.14	0.2	5566	29	34
bbc oldest outside broadcast	1.6	0.7	6877	28	61
first national radio broadcast	0.99	0.2	7994	30	5
history of tv broadcasting	1.25	1	6138	26	9
list of television broadcasting history	0.68	0.5	1296	39	67
history of broadcast television	0.64	1	7510	31	38
history of broadcast news	2	0.3	2196	25	31

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