A survey of basic concepts of combinatorial chemistry and combinatorial tec
hnologies and a great impact of this new approach on the traditional chemis
try is presented. The main fields of application of CC/CT are reviewed and
the reasons why CC/CT is so strongly needed and demanded are given. Be;ides
obvious utilization of CC/CT in drug discovery, agrochemical research and
research and development of new materials and catalysts also gain from this
approach. The paper describes the origins and development of the technique
, formed on the basis of probabilistic justifications. The applicability of
combinatorial technologies and main combinatorial tools are described toge
ther with computer-assisted combinatorial chemistry, molecular design and b
iological methods of CC/CT. A Ist of important Web resources relevant to th
e topic is also presented.