3TU.Datacentrum is a collaboration of the libraries of the three technical universities which together form the 3TU.Federation. Professional storage, retrieval and provision of technical-scientific publications has always been the core task of the technical university libraries. We have long experience with digital archiving. For example, we manage repositories-digital archives in which the complete texts of the university's publications are stored and can be consulted online. We also provide advanced information services and products to support students and academics in their studies and work processes.