W Economic sectors > W.19 ICT industry > W.19.04 Telecommunications > Telephone

N Related subject areas > N.08 Culture and humanities > N.08.04 Communications and media > Telecommunications > Telephone

... > B Business economics > B.01 Management and business organization > B.01.03 Corporate information and communication > Communication > Telecommunications > Telephone

... > N Related subject areas > N.08 Culture and humanities > N.08.04 Communications and media > Communication > Telecommunications > Telephone

... > N Related subject areas > N.06 Social sciences > N.06.03 Social behaviour > N.06.03.01 Social relations > Communication > Telecommunications > Telephone

B Business economics > B.09 Business information systems > Telecommunications > Telephone

W Economic sectors > W.19 ICT industry > W.19.04 Telecommunications > Telecommunications > Telephone

N Related subject areas > N.10 Natural sciences and technology > N.10.05 Information technology and computer science > Telecommunications > Telephone

P Commodities > P.10 Electrical Engineering and Electronic Products > P.10.04 ICT equipment > Telecommunications equipment > Telephone

P Commodities > P.10 Electrical Engineering and Electronic Products > P.10.04 ICT equipment > Telephone