This data collection was conducted by the Institute of the Information Society of the University of Public Service - Ludovika, and covered four Central European countries: the Czech Republic, Hungary, Poland, and Romania, with the aim of examining the characteristics of the use of information technology by the adult population in the region, mainly for communication purposes. A telephone survey was conducted in October and November 2019, and the results are representative of the population over 18 years of age in the four countries, categorized by age, gender, education, type of settlement and region. The data set contains: Questionnaires in the original languages (Hungarian, Czech, Romanian and Polish), and all questionnaires in English language, too. The four databases with variables in English Merged database of four databases Code table about variables