The symposium on Science Institutions in Islamic Civilisation was organised by IRCICA with the cooperation of the Turkish Society for History of Science (TBTK), UNESCO and the Third World Academy of Science (TWAS), in İstanbul, 1991. As to the symposium on Science and Technology in the Turkish and Islamic World, it wasorganised with the collaboration of the Turkish Society for Historyof Science (TBTK), Bosphorus and Marmara Universities (İstanbul) and the Uzbekstan Academy of Sciences, on the occasion of the 600th birthday of Ulugh Bey and the 125th anniversary of the foundation of Kandilli Observatory (İstanbul). The book contains twenty-three research papers which were presented during these symposia.