The electronic resource titled '20 January. Aggression 1990' that contains seven chapters, prepared by the Presidential Library, provides detailed information about the causes and scope of the January 20 tragedy. The resource also provides collection of documents about the bloody tragedy, official ceremonies and commemorative events held in memory of January 20. The texts and bibliographic descriptions of selected books and analytical articles related to January 20 tragedy, as well as photo and video archives are also available on the electronic resource. Presentation of the electronic edition in Azerbaijani, English and Russian languages is of great importance in terms of informing the world public about the aggression committed against our nation.