Systematic analysis of electronic segment of world and domestiс economy development is presented from its primary forms to the modern condition. The prospects of society’s informationalization in the future are determined. Imperfection of theoretical base of internalization in the different sectors of electronic business has been proved. The author’s opinion on the conception of Information society structure and definitions of «Electronic Business», «Electronic Commerce» and «Electronic Trade» has been presented. 

information society, electronic business, electronic commerce, electronic trade