Know-how, the aggregate of scientific and technological knowledge, technical and production experience, production secrets and inventions that have not been patented for various reasons. Know-how constitutes the wealth of information necessary for organising corresponding production. The importance of know-how has particularly grown during the scientific and technological revolution. Know-how has become an independent field of license deals, one form of the international exchange of scientific and technological knowledge on a commercial basis. Under conditions of statemonopoly capitalism, know-how is monopolised by the biggest corporations and imperialist states.