The CompSysTech'21 International conference is organised by THE BULGARIAN ACADEMIC SOCIETY OF COMPUTING and its OBJECTIVE is to intensify the information exchange of the results in theoretical research and practical developments in this field. Its papers will be published in the ACM International Conference Proceedings Series.

All CompSysTech International conferences from 2007 to 2018 were organised by THE ASSOCIATION FOR COMPUTING MACHINERY (ACM) , N.Y., USA via its Bulgarian Chapter - acmbul and by THE BULGARIAN ACADEMIC SOCIETY OF COMPUTING.

The conference is organised under the patronage of:

• Bulgarian Ministry of Education and Science;
• John Atanasoff Union of Automation and Informatics;
• University of Ruse.