This page is about two lessons, delivered over distance, concerning the sequence diagrams of UML (Unified Modeling Language).
However, because the students were at the dept. of Informatics of the Aristotle University of Thessaloniki, the whole set is in Greek language! Some information in English language will be added here in time, as well...
So, if You speak Greek and You have Greek fonts installed in Your System, proceed to the corresponding Greek sector...