Professor Evgueni A. Haroutunian, a recognized scientist and respected teacher, Chief Researcher of the Institute for Informatics and Automation Problems of the NAS of RA, Founder of the Scientific School of Information Theory in Armenia, was the Deputy Editor of Transactions of IIAP NAS RA “Mathematical Problems of Computer Science” for many years. Professor Haroutunian achieved great scientific achievements during his long and fruitful activity. His contribution to the development of Information Theory and Mathematical Statistics is valuable. His scientific results have been repeatedly cited by well-known scientists, included in basic monographs on information theory and in university textbooks. He had been working in IIAP of NAS of RA since 1958 and leading the department for Information Theory and Applied Statistics for 25 years. Professor Haroutunian conducted pedagogical activities in the leading universities of Armenia, making a significant contribution to the training of young high-quality staff. For his great service to country and science E. Haroutunian was awarded a gold medal of National Academy of Sciences of Armenia, the Medal of Honour of the Republic of Armenia. Evgueni Haroutunian achieved the Life Member status, as a sign of his long-term loyal membership and support to IEEE. He had also been a member of the International Statistical Institute, the Institute of Mathematical Statistics and the Bernoulli Society for Mathematical Statistics and Probability for many years. The Professor always enjoyed the love and respect, as well as the great reputation of the staff and students and will remain in their thoughts and memories for long.