This article analyzes the concept and significance of information technologies, forms of information use, the role of networks, electronic communication services and expertise in combating crime. The author defines concepts and classification of forensic computer expertise as computer-programming expertise, computer-network expertise, computer-information expertise, computer-technical expertise and computer-digital expertise. The article analyzes the classification of technical means as computers, laptops, smartphones, printers, scanners, cameras, mobile phones, GPS navigators, media, cash equipment with fiscal memory and determines the features of their traces. The analysis resulted in proposals for improving the norms of the national criminal procedure legislation in the field of detection, fixing of evidentiary information stored on the Internet resources or in other technical means and conducting forensic computer examinations.