Safeguarding Information Technology (IT) heritage is a matter of general interest. This is the aim of the ITinHeritage project, which takes a heritage-based approach to IT museums in France and around the world. The unprecedented study of this heritage leads us to understand how to perpetuate and mediate contemporary scientific and technical knowledge, of which data is the new heritage. They also constitute the new corpora, which means that terminology work needs to be rethought. The ITinHeritage project aims to develop an innovative approach to digital humanities by creating a corpus from the collections of IT museums, organised in the form of a knowledge graph, and by using methods and tools that combine traditional linguistic approaches and explorations in the computer sciences. Big data, AI and NLP are thus being used to explore, enhance and perpetuate their own heritage.