All Library of Congress systems will be taken offline temporarily beginning Friday evening, including the EAD Listserv. Service is expected to be restored by Tuesday. The Library of Congress has planned extensive electrical work and power maintenance for this coming weekend. As a protective measure, all Library systems will be powered down. The maintenance period is scheduled for completion by Tuesday morning, when it is expected all Library systems will have been restored to normal operation. Though it is anticipated work will not be fully completed until late Monday or early Tuesday, services will begin coming back online before then. We regret any inconvenience this may cause and thank you in advance for your patience. Best, Glenn