The collection of the National Library of Greece are classified according to an old classification scheme, Hallische System. It is rather inflexible scheme, but it is difficult to change it because of lack of space and staff. Greek subject headings based on the LC Subject Headings are used. For the needs of the Greek National Bibliography is used Dewey Decimal Classification. The National Library of Greece may be used with a valid registration card.
Material is available for use only in the reading rooms.
The Manuscripts Department is open Monday to Friday 09.00-14.00. The Library is closed on August. It is now planned to extend the services of this system in order to allow remote access via the Internet.