RFC 0501  tools.ietf.org/html/rfc501 Un-Muddling "Free File Transfer". K.T. Pogran. May 1973.

RFC 0503  tools.ietf.org/html/rfc503 Socket Number List. N. Neigus, J. Postel. April 1973.

RFC 0504  tools.ietf.org/html/rfc504 Distributed Resources Workshop Announcement. R. Thomas. April 1973.

RFC 0505  tools.ietf.org/html/rfc505 Two Solutions to a File Transfer Access Problem. M.A. Padlipsky. June 1973.

RFC 0506  tools.ietf.org/html/rfc506 FTP Command Naming Problem. M.A. Padlipsky. June 1973.

RFC 0508  tools.ietf.org/html/rfc508 Real-Time Data Transmission on the ARPANet. L. Pfeifer, J. McAfee. May 1973.

RFC 0509  tools.ietf.org/html/rfc509 Traffic Statistics. (April 1973). A.M. McKenzie. April 1973.

RFC 0510  tools.ietf.org/html/rfc510 Request for Network Mailbox Addresses. J.E. White. May 1973.

RFC 0511  tools.ietf.org/html/rfc511 Enterprise Phone Service to NIC From ARPANET Sites. J.B. North. May 1973.

RFC 0512  tools.ietf.org/html/rfc512 More on Lost Message Detection. W. Hathaway. May 1973.

RFC 0513  tools.ietf.org/html/rfc513 Comments on the New Telnet Specifications. W. Hathaway. May 1973.

RFC 0514  tools.ietf.org/html/rfc514 Network Make-Work. W. Kantrowitz. June 1973.

RFC 0516  tools.ietf.org/html/rfc516 Lost Message Detection. J. Postel. May 1973.

RFC 0518  tools.ietf.org/html/rfc518 ARPANet Accounts. N. Vaughan, E.J. Feinler. June 1973.

RFC 0520  tools.ietf.org/html/rfc520 A Proposal for File Access Protocol. J.D. Day. June 1973.

RFC 0521  tools.ietf.org/html/rfc521 Restricted Use of IMP DDT. A.M. McKenzie. May 1973.

RFC 0523  tools.ietf.org/html/rfc523 SURVEY is in Operation Again. A.K. Bhushan. June 1973.

RFC 0524  tools.ietf.org/html/rfc524 Proposed Mail Protocol. J.E. White. June 1973.

RFC 0525  tools.ietf.org/html/rfc525 MIT-MATHLAB Meets UCSB-OLS: An Example of Resource Sharing. W. Parrish, J.R. Pickens. June 1973.

RFC 0526  tools.ietf.org/html/rfc526 Technical Meeting: Digital Image Processing Software Systems. W.K. Pratt. June 1973.

RFC 0527  tools.ietf.org/html/rfc527 ARPAWOCKY. D.L. Covill. May 1973.

RFC 0528  tools.ietf.org/html/rfc528 Software Checksumming in the IMP and Network Reliability. J.M. McQuillan. June 1973.

RFC 0529  tools.ietf.org/html/rfc529 A Note on Protocol Synch Sequences. A.M. McKenzie, R. Thomas, R.S. Tomlinson, et al. June 1973.

RFC 0531  tools.ietf.org/html/rfc531 Feast or Famine? A Response to Two Recent RFCs About Network Information. M.A. Padlipsky. June 1973.

RFC 0532  tools.ietf.org/html/rfc532 The UCSD-CC Server-FTP Facility. R.G. Merryman. July 1973.

RFC 0533  tools.ietf.org/html/rfc533 Message-ID Numbers. D.C. Walden. July 1973.

RFC 0534  tools.ietf.org/html/rfc534 Lost Message Detection. D.C. Walden. July 1973.

RFC 0537  tools.ietf.org/html/rfc537 Announcement of NGG Meeting July 16-17. S. Bunch. June 1973.

RFC 0538  tools.ietf.org/html/rfc538 Traffic Statistics (June 1973). A.M. McKenzie. July 1973.

RFC 0539  tools.ietf.org/html/rfc539 Thoughts on the Mail Protocol Proposed in RFC 524. D. Crocker, J. Postel. July 1973.

RFC 0542  tools.ietf.org/html/rfc542 File Transfer Protocol. N. Neigus. August 1973.

RFC 0543  tools.ietf.org/html/rfc543 Network Journal Submission and Delivery. N.D. Meyer. July 1973.

RFC 0544  tools.ietf.org/html/rfc544 Locating On-Line Documentation at SRI-ARC. N.D. Meyer, K. Kelley. July 1973.

RFC 0545  tools.ietf.org/html/rfc545 Of What Quality Be the UCSB Resources Evaluators? A Response to "Feast of Famine". J.R. Pickens. July 1973.

RFC 0546  tools.ietf.org/html/rfc546 TENEX Load Averages for July 1973. R. Thomas. August 1973.

RFC 0547  tools.ietf.org/html/rfc547 Change to the Very Distant Host Specification. D.C. Walden. August 1973.

RFC 0548  tools.ietf.org/html/rfc548 Hosts Using the IMP Going Down Message. D.C. Walden. August 1973.

RFC 0549  tools.ietf.org/html/rfc549 Minutes of Network Graphics Group meeting, 15-17 July 1973. J.C. Michener. July 1973.

RFC 0550  tools.ietf.org/html/rfc550 NIC NCP Experiment. L.P. Deutsch. August 1973.

RFC 0552  tools.ietf.org/html/rfc552 Single Access to Standard Protocols. A.D. Owen. July 1973.

RFC 0555  tools.ietf.org/html/rfc555 Responses to Critiques of the Proposed Mail Protocol. J.E. White. July 1973.

RFC 0559  tools.ietf.org/html/rfc559 Comments on the New Telnet Protocol and its Implementation. A.K. Bhushan. August 1973.

RFC 0561  tools.ietf.org/html/rfc561 Standardizing Network Mail Headers. A.K. Bhushan, K.T. Pogran, R.S. Tomlinson, et al. September 1973.

RFC 0567  tools.ietf.org/html/rfc567 Cross Country Network Bandwidth. L.P. Deutsch. September 1973.

RFC 0568  tools.ietf.org/html/rfc568 Response to RFC 567 - Cross Country Network Bandwidth. J.M. McQuillan. September 1973.

RFC 0569  tools.ietf.org/html/rfc569 NETED: A Common Editor for the ARPA Network. M.A. Padlipsky. October 1973.

RFC 0580  tools.ietf.org/html/rfc580 Note to Protocol Designers and Implementers. J. Postel. October 1973.

RFC 0584  tools.ietf.org/html/rfc584 Charter for ARPANET Users Interest Working Group. J. Iseli, D. Crocker, N. Neigus. November 1973.

RFC 0585  tools.ietf.org/html/rfc585 ARPANET Users Interest Working Group Meeting. D. Crocker, N. Neigus, E.J. Feinler, et al. November 1973.

RFC 0589  tools.ietf.org/html/rfc589 CCN NETRJS Server Messages to Remote User. R.T. Braden. November 1973.

RFC 0591  tools.ietf.org/html/rfc591 Addition to the Very Distant Host Specifications. D.C. Walden. November 1973.

RFC 0593  tools.ietf.org/html/rfc593 Telnet and FTP Implementation Schedule Change. A.M. McKenzie, J. Postel. November 1973.

RFC 0595  tools.ietf.org/html/rfc595 Second Thoughts in Defense of the Telnet Go-Ahead. W. Hathaway. December 1973.

RFC 0596  tools.ietf.org/html/rfc596 Second Thoughts on Telnet Go-Ahead. E.A. Taft. December 1973.

RFC 0597  tools.ietf.org/html/rfc597 Host Status. N. Neigus, E.J. Feinler. December 1973.

RFC 0599  tools.ietf.org/html/rfc599 Update on NETRJS. R.T. Braden. December 1973.