Abstract: Background: information technologies and systems have become an integral part of society. State and municipal authorities are forced to adapt to the digital reality. One important part of this process is establishing a clear and logical terminological base. However, at present there are no normative definitions of commonly used terms related to the processes of implementation and use of information technologies. Objective: to analyze the concepts of computerization, informatization, automation, digitalization and digital transformation of state and municipal government, to draw a relationship between these concepts and give their definition. Methodology: general analysis, formal logic method, comparative analysis, as well as system-structural method. Results and conclusions: it was concluded that the terms computerization, informatization, automation, digitalization and digital transformation have different meanings and actually reflect various aspects of the process of introduction and dissemination of information and telecommunication technologies into the life of society and the state, while they are closely related to each other and in fact are carried out simultaneously. Based on the analysis of scientific literature and current legislation, a comprehensive categorical and terminological apparatus of processes associated with the introduction and use of information technologies and systems in the activities of state and municipal authorities is proposed. The proposed formulations help establish terminological clarity and certainty and can be used in regulations and further scientific research.