However, their relative importance varies depending on the field they belong to. Patents are particularly important in the development of science and computer technologies. While the social sciences and arts normally deal with copyright, the expansion of databases and information technologies gives database rights and copyrights and increasing importance to the sciences. Intellectual property is classified into the categories: copyright and industrial property. However, the main types of intellectual property rights in the development of information technologies include copyright, database rights, patents, trademarks, performance rights and design rights (Cook