 Within the Czech Republic CESNET fulfils the role of a coordinator of large infrastructures involved in the field of information technology.The CESNET e-infrastructure is a complex system of interconnected tools that provides a wide range of services necessary for transmission, storage and data processing.These include, for example, performance computing clusters with programs used in many areas, a large data repository used for data storage and sharing, multimedia communication tools making cooperation between distributed teams easier, and other services.