The enterprise survey is conducted at enterprises randomly chosen by the systematic sampling by industry, stratified according to the size of regular employees from those with 100 or more employees. Radio stations Radio stations refer to the wireless telegraphs, wireless telephones and other electric facilities for transmitting and receiving radio waves together with the persons who operate these facilities. Radio use has been increasing and diversifying in step with socio-economic developments and progress in information technology. 12 Information and Communication 325
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