The aim of this dissertation is to create a Croatian-English-German online term base that contains the informatics terminology taken from Croatian and German elementary school textbooks, as well their English translations. The paper consists of a theoretical and a practical part. The theoretical part presents the importance of a uniformed specific technical terminology and lists the most important terminological tools, resources, and online language resources. An analysis of the technical terms from the Croatian and German informatics textbooks was also conducted. The analysis shows that most Croatian and German informatics terms do not have an English translation equivalent next to them. However, the Croatian textbooks have a larger amount than the German ones. The problem with the use of educational content in the field of informatics, and above that the digital educational content, is the lack of sources in the Croatian language. Therefore, it is necessary to provide more online resources that would allow them easier studies and an understanding of the subject material, but also ease their further education and use of digital technologies and digital resources, such as multilingual term bases. After selecting the specific terms from Croatian primary school textbooks and the appropriate translations for English and German, an online term base for Croatian-English-German language was created. The online term base is available to students, teachers and the general population.