It is hereby certified that Vangelis Kontogiannis has successfully attended and completed the course: DS1.1: Introduction to Microsoft Excel 2021

which is offered by Mathesis MOOCs, developed in Crete University Press of the Foundation for Research and Technology - Hellas, with the lecturer Mr Stefanos Vamvakos, Science Communicator, creator of "Everyday Physics"

The duration of the course was four weeks —2/12/2024 until 29/12/2024— with an estimated study time of 30 hours needed to complete the course. This course is offered via the platform OpenEdX/gr of Mathesis in compliance with all established technical and educational specifications. The assessment procedure is based on the honour code by which the participants commit to abide. The responsibility for the content of the course and its assessment lies exclusively with the lecturer. The final assignment was evaluated by the lecturer and his assistants.