The network of administrative services of N.C.S.R. DEMOKRITOS was materialized in order to cover the needs for communication between the Institutes secretariats, the library, the special account, the employees’ office and other administrative services as well as with the informatics centre and the Internet. The network was materialized as a library project with the writer in charge of the design and materialization. The Diana network has been materialized as a sum of local area networks and independent workstations, which are interconnected between them via N.C.S.R.’s cable infrastructure of thick Ethernet. The network offered services such as e-mail, which supports Greek, online conference, central fax gateway, Telnet gateway, catalogue services compatible with X.500 etc.