http://www.rfc-editor.org/rfc/rfc0908.txt
RFC 0908: Reliable Data Protocol, D. Velten, R.M. Hinden, J. Sax1984-07-01T23:00:00-00:00The Reliable Data Protocol (RDP) is designed to provide a reliable data transport service for packet-based applications. This RFC specifies a proposed protocol for the ARPA-Internet and DARPA research community, and requests discussion and suggestions for improvemts.