RFC 0644 On the Problem of Signature Authentication for Network Mail. R. Thomas. July 1974. http://www.faqs.org/rfcs/rfc644.html

RFC 0636 TIP/Tenex Reliability Improvements. J.D. Burchfiel, B. Cosell, R.S. Tomlinson, et al. June 1974. http://www.faqs.org/rfcs/rfc636.html

RFC 0634 Change in Network Address for Haskins Lab. A.M. McKenzie. April 1974. http://www.faqs.org/rfcs/rfc634.html

RFC 0632 Throughput Degradations for Single Packet Messages. H. Opderbeck. May 1974. http://www.faqs.org/rfcs/rfc632.html

RFC 0630 FTP Error Code Usage for More Reliable Mail Service. J. Sussmann. April 1974. http://www.faqs.org/rfcs/rfc630.html

RFC 0628 Status of RFC Numbers and a Note on Pre-Assigned Journal Numbers. M.L. Keeney. March 1974. http://www.faqs.org/rfcs/rfc628.html

RFC 0627 ASCII Text File of Hostnames. M.D. Kudlick, E.J. Feinler. March 1974. http://www.faqs.org/rfcs/rfc627.html

RFC 0624 Comments on the File Transfer Protocol. M. Krilanovich, G. Gregg, W. Hathaway, et al. February 1974. http://www.faqs.org/rfcs/rfc624.html

RFC 0623 Comments on On-Line Host Name Service. M. Krilanovich. February 1974. http://www.faqs.org/rfcs/rfc623.html

RFC 0619 Mean Round-Trip Times in the ARPANET. W. Naylor, H. Opderbeck. March 1974. http://www.faqs.org/rfcs/rfc619.html

RFC 0640 Revised FTP Reply Codes. J. Postel. June 1974. http://www.faqs.org/rfcs/rfc640.html

RFC 0681 Network UNIX. S. Holmgren. March 1975. http://www.faqs.org/rfcs/rfc681.html

RFC 0643 Network Debugging Protocol. E. Mader. July 1974. http://www.faqs.org/rfcs/rfc643.html

RFC 0617 Note on Socket Number Assignment. E.A. Taft. February 1974. http://www.faqs.org/rfcs/rfc617.html

RFC 0658 Telnet Output Linefeed Disposition. D. Crocker. October 1974. http://www.faqs.org/rfcs/rfc658.html

RFC 0687 IMP/Host and Host/IMP Protocol Changes. D.C. Walden. June 1975. http://www.faqs.org/rfcs/rfc687.html

RFC 0672 Multi-Site Data Collection Facility. R. Schantz. December 1974. http://www.faqs.org/rfcs/rfc672.html

RFC 0620 Request for Monitor Host Table Updates. B. Ferguson. March 1974. http://www.faqs.org/rfcs/rfc620.html

RFC 0633 IMP/TIP Preventive Maintenance Schedule. A.M. McKenzie. March 1974. http://www.faqs.org/rfcs/rfc633.html

RFC 0638 IMP/TIP Preventive Maintenance Schedule. A.M. McKenzie. April 1974. http://www.faqs.org/rfcs/rfc638.html