CARNet (Croatian Academic and Research Network) started in 1991. as a project and in 1995, became an institutions gathering and serving all academic institutions in Croatia. From the very begining it has embraced open source as a solution to graet many services. From DNS via standard internet services like email and www to specific applications, CARNet has always relied on open source solutions. This presentations gives overview of past activities including all institutions that are members of CARNet network. Work on promotion and user services is described as well.