Proceedings and workbook of the Electroporation-Based Technologies and Treatments of the International SCIENTIFIC WORKSHOP and POSTGRADUATE COURSE. Cell membrane electroporation, its mechanisms and applications in biology, medicine and biotechnology. The basis of the phenomena, current applications and future prospects will be main topics of this international meeting. The idea of organizing the Workshop and Postgraduate Course on Electroporation Based Technologies and Treatments at the University of Ljubljana had been developing for several years. After preliminary discussions, the Workshop and Course was organised for the first time in 2003. In 2020 the Course is organised for the 14th time! In these fourteen years, the Course has been attended by 844 participants coming from 41 different countries. And this year again - in spite of pandemics - we can say with great pleasure: %with participation of many of the world leading experts in the field% - unfortunately however, as an online event.