Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Loet Leydesdorff (21 August 1948 Djakarta (Dutch Indies)) is a, Dutch sociologistyberneticist and Senior Lecturer at the University of Amsterdam. He is known for his work in the sociology of communication and innovation. Leydesdorff was born in 1948 in Djakarta in the Dutch Indies. He received a B.Sc. in chemistry in 1969, a M.Sc. biochemistry in 1973, an M.A. in philosophy in 1977 and in 1984 a Ph.D. in sociology. In 1969 he started working as part-time professor for chemical technology at the Gerrit Rietveld Academie in Amsterdam. In 1972 he started his career at the University of Amsterdam as teaching assistant for "Science and Society" at the Philosophy Faculty. In 1980 he became Senior lecturer at the Department of Science & Technology Dynamics of the University of Amsterdam and since 2000 the Amsterdam School of Communications Research as well.