The Virtual Library of Serbia is a system linking member libraries that actively work in the system. In addition to the National Library of Serbia, the Matica Srpska Library, the University Library in Belgrade, and the Yugoslav Bibliographic-Information Institute have played a key role in the system since its very beginning.
The paper illustrates the chronological development of individual COBISS3 software versions. It describes the key characteristics of individual modules, the experience in implementing essential functionalities and the training of users. Included in the paper are statistical data and indicators on the current usage of the COBISS3 software.
The paper presents new COBISS applications and their use by libraries operating within the COBISS.Net network. An emphasis is placed on new features in the shared cataloguing system, in particular, when moving to a new COBISS3/Cataloguing interface.