The CoSyLLab (Computer Supported Learning Engineering Lab) belongs to the Department of Digital Systems of the University of Piraeus, in Piraeus, Greece. The research unit was established in 2003 by Dr. Symeon Retalis, Professor in the same department. CoSy-LLab members conduct research in the broader area of e-learning with emphasis on the engineering aspect of e-learning.

Elearning Engineering is concerned with the establishment and use of systematic and formal principles, methods and technologies standards for the successful development, deployment and maintenance of high quality elearning systems and applications. The term 'E-learning' signifies the use of networked computer environments and tools as well as open, flexible and active learning methods for education, training and lifelong learning.