Connecting factories, production, machinery, logistics and customers in a smart and fast network environment with the help of information and communication technologies has brought social and business life to a level above countries and businesses. It is possible to eliminate this large and complex situation quickly and accurately, by having a good grasp of the important concepts that form the focus of digitalization. In order to make the digital world more understandable to users, this glossary guidebook contains important digital concepts from various international sources. We believe that understanding the key terms of digitization is the cornerstone of digital transformation.