Data Management System Proposal for the ARPA Network
RFC 304, “Data Management System Proposal for the ARPA Network”, is an Unknown document published in February 1972 by D.B. McKay. The canonical text is published by the RFC Editor.
What “Unknown” means
The standards-track status of this early RFC was never formally classified.
The canonical text of RFC 304 is hosted at rfc-editor.org. Available in TXT,PDF,HTML.