    Network Working Group                                          J. Postel
    Request for Comments: 1543                                           ISI
    Obsoletes: RFCs 1111, 825                                   October 1993
    Category: Informational

                          Instructions to RFC Authors

    Status of this Memo

       This memo provides information for the Internet community.  This memo
       does not specify an Internet standard of any kind.  Distribution of
       this memo is unlimited.

    Table of Contents

       1.   Introduction . . . . . . . . . . . . . . . . . . . . . . . . 1
       2.   Editorial Policy . . . . . . . . . . . . . . . . . . . . . . 3
       3.   Format Rules . . . . . . . . . . . . . . . . . . . . . . . . 4
       3a.   ASCII Format Rules  . . . . . . . . . . . . . . . . . . . . 4
       3b.   PostScript Format Rules . . . . . . . . . . . . . . . . . . 5
       4.   Header . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
       4a.   First Page Heading  . . . . . . . . . . . . . . . . . . . . 6
       4b.   Running Header  . . . . . . . . . . . . . . . . . . . . . . 7
       4c.   Running Footer  . . . . . . . . . . . . . . . . . . . . . . 7
       5.   Status Section . . . . . . . . . . . . . . . . . . . . . . . 5
       6.   Introduction Section . . . . . . . . . . . . . . . . . . . . 8
       7.   References Section . . . . . . . . . . . . . . . . . . . . . 9
       8.   Security Considerations Section  . . . . . . . . . . . . .  10
       9.   Author's Address Section . . . . . . . . . . . . . . . . .  10
       10.  Relation to other RFCs . . . . . . . . . . . . . . . . . .  10
       11.  Protocol Standards Process . . . . . . . . . . . . . . . .  11
       12.  Contact  . . . . . . . . . . . . . . . . . . . . . . . . .  11
       13.  Distribution Lists . . . . . . . . . . . . . . . . . . . .  11
       14.  RFC Index  . . . . . . . . . . . . . . . . . . . . . . . .  12
       15.  Security Considerations  . . . . . . . . . . . . . . . . .  12
       16.  References . . . . . . . . . . . . . . . . . . . . . . . .  12
       17.  Author's Address . . . . . . . . . . . . . . . . . . . . .  12
       18.  Appendix - RFC "nroff macros"  . . . . . . . . . . . . . .  13

    1.  Introduction

       This Request for Comments (RFC) provides information about the
       preparation of RFCs, and certain policies relating to the publication
       of RFCs.

       The RFC series of notes covers a broad range of interests.  The core
       topics are the Internet and the TCP/IP protocol suite.  However, any

    Postel                                                          [Page 1]

    RFC 1543              Instructions to RFC Authors           October 1993

       topic related to computer communication may be acceptable at the
       discretion of the RFC Editor.

       Memos proposed to be RFCs may be submitted by anyone.  One large
       source of memos that become RFCs is the Internet Engineering Task
       Force (IETF).  The IETF working groups (WGs) evolve their working
       memos (known as Internet Drafts or I-Ds) until they feel they are
       ready for publication, then the memos are reviewed by the Internet
       Engineering Steering Group (IESG), and if approved sent by the IESG
       to the RFC Editor.

       RFCs are distributed online by being stored as public access files,
       and a short message is sent to the distribution list indicating the
       availability of the memo.

       The online files are copied by the interested people and printed or
       displayed at their site on their equipment.  This means that the
       format of the online files must meet the constraints of a wide
       variety of printing and display equipment.  (RFCs may also be
       returned via e-mail in response to an e-mail query, or RFCs may be
       found using information and database searching tools such as Gopher,
       Wais, WWW, or Mosaic.)

       RFCs have been traditionally published and continue to be published
       in ASCII text.

       While the primary RFCs is always an ASCII text file, secondary or
       alternative versions of RFC may be provided in PostScript.  This
       decision is motivated by the desire to include diagrams, drawings,
       and such in RFCs.  PostScript documents (on paper only, so far) are
       visually more appealing and have better readability.

       PostScript was chosen for the fancy form of RFC publication over
       other possible systems (e.g., impress, interpress, oda) because of
       the perceived wide spread availability of PostScript capable
       printers.

       However, many RFC users read the documents online and use various
       text oriented tools (e.g., emacs, grep) to search them.  Often, brief
       excerpts from RFCs are included in e-mail.  These practices are not
       yet practical with PostScript files.

       PostScript producing systems are less standard than had been assumed
       and that several of the document production systems that claim to
       produce PostScript actually produce nonstandard results.

       In the future, it may be necessary to identify a set of document
       production systems authorized for use in production of PostScript

    Postel                                                          [Page 2]

    RFC 1543              Instructions to RFC Authors           October 1993

       RFCs, based on the reasonableness of the output files they generate.

    2.  Editorial Policy

       Documents proposed to be RFCs are reviewed by the RFC Editor and
       possibly by other reviewers he selects.

       The result of the review may be to suggest to the author some
       improvements to the document before publication.

       Occasionally, it may become apparent that the topic of a proposed RFC
       is also the subject of an IETF Working Group, and that the author
       could coordinate with the working group to the advantage of both.
       The usual result of this is that a revised memo is produced as a
       working group Internet Draft and eventually emerges from the IETF
       process as a recommendation from the IESG to the RFC Editor.

       In some cases it may be determined that the submitted document is not
       appropriate material to be published as an RFC.

       In some cases it may be necessary to include in the document a
       statement based on the reviews about the ideas in the document.  This
       may be done in the case that the document suggests relevant but
       inappropriate or unsafe ideas, and other situations.

       The RFC Editor may make minor changes to the document, especially in
       the areas of style and format, but on some occasions also to the
       text.  Sometimes the RFC Editor will undertake to make more
       significant changes, especially when the format rules (see below) are
       not followed.  However, more often the memo will be returned to the
       author for the additional work.

       Documents intended to become RFCs specifying standards track
       protocols must be approved by the IESG before being sent to the RFC
       Editor.  The established procedure is that when the IESG completes
       work on a document that is to become a standards track RFC the
       communication will be from the Secretary of the IESG to the RFC
       Editor.  Generally, the documents in question are Internet Drafts.
       The communication usually cites the exact Internet Draft in question
       (by file name).  The RFC Editor must assume that only that file is to
       be processed to become the RFC.  If the authors have small
       corrections to the text, they should be sent to the RFC Editor
       separately (or as a "diff"), do not send a new version of the
       document.

       In some cases, authors prepare alternate secondary versions of RFCs
       in fancy format using PostScript.  Since the ASCII text version of
       the RFC is the primary version, the PostScript version must match the

    Postel                                                          [Page 3]

    RFC 1543              Instructions to RFC Authors           October 1993

       text version.  The RFC Editor must decide if the PostScript version
       is "the same as" the ASCII version before the PostScript version can
       be published.

       The effect of this is that the RFC Editor first processes the ASCII
       version of the memo through to publication as an RFC.  If the author
       wishes to submit a PostScript version at that point that matches the
       ASCII version (and the RFC Editor agrees that it does), then the
       PostScript version will be installed in the RFC repositories and
       announced to the community.

       Due to various time pressures on the RFC Editorial staff the time
       elapsed between submission and publication can vary greatly.  It is
       always acceptable to query (ping) the RFC Editor about the status of
       an RFC during this time (but not more than once a week).  The two
       weeks preceding an IETF meeting are generally very busy, so RFCs
       submitted shortly before an IETF meeting are most likely to be
       published after the meeting.

    3.  Format Rules

       To meet the distribution constraints, the following rules are
       established for the two allowed formats for RFCs:  ASCII and
       PostScript.

       The RFC Editor attempts to ensure a consistent RFC style.  To do this
       the RFC Editor may choose to reformat the RFC submitted.  It is much
       easier to do this if the submission matches the style of the most
       recent RFCs.  Please do look at some recent RFCs and prepare yours in
       the same style.

       You must submit an editable online document to the RFC Editor.  The
       RFC Editor may require minor changes in format or style and will
       insert the actual RFC number.

       Most of the RFCs are processed by the RFC Editor with the unix
       "nroff" program using a very simple set of the formatting commands
       (or "requests") from the "ms" macro package (see the appendix).  If a
       memo submitted to be an RFC has been prepared by the author using
       nroff, it is very helpful to let the RFC Editor know that when it is
       submitted.

       3a.  ASCII Format Rules

          The character codes are ASCII.

          Each page must be limited to 58 lines followed by a form feed on a
          line by itself.

    Postel                                                          [Page 4]

    RFC 1543              Instructions to RFC Authors           October 1993

          Each line must be limited to 72 characters followed by carriage
          return and line feed.

          No overstriking (or underlining) is allowed.

          These "height" and "width" constraints include any headers,
          footers, page numbers, or left side indenting.

          Do not fill the text with extra spaces to provide a straight right
          margin.

          Do not do hyphenation of words at the right margin.

          Do not use footnotes.  If such notes are necessary, put them at
          the end of a section, or at the end of the document.

          Use single spaced text within a paragraph, and one blank line
          between paragraphs.

          Note that the number of pages in a document and the page numbers
          on which various sections fall will likely change with
          reformatting.  Thus cross references in the text by section number
          usually are easier to keep consistent than cross references by
          page number.

          RFCs in ASCII Format may be submitted to the RFC Editor in e-mail
          messages (or as online files) in either the finished publication
          format or in NROFF.  If you plan to submit a document in NROFF
          please consult the RFC Editor first.

       3b.  PostScript Format Rules

          Standard page size is 8 1/2 by 11 inches.

          Margin of 1 inch on all sides (top, bottom, left, and right).

          Main text should have a point size of no less than 10 points with
          a line spacing of 12 points.

          Footnotes and graph notations no smaller than 8 points with a line
          spacing of 9.6 points.

          Three fonts are acceptable: Helvetica, Times Roman, and Courier.
          Plus their bold-face and italic versions.  These are the three
          standard fonts on most PostScript printers.

          Prepare diagrams and images based on lowest common denominator
          PostScript.  Consider common PostScript printer functionality and

    Postel                                                          [Page 5]

    RFC 1543              Instructions to RFC Authors           October 1993

          memory requirements.

          The following PostScript commands should not be used:
          initgraphics, erasepage, copypage, grestoreall, initmatrix,
          initclip, banddevice, framedevice, nulldevice and renderbands.

          Note that the number of pages in a document and the page numbers
          on which various sections fall will likely differ in the ASCII and
          the PostScript versions.  Thus cross references in the text by
          section number usually are easier to keep consistent than cross
          references by page number.

          These PostScript rules are likely to changed and expanded as
          experience is gained.

          RFCs in PostScript Format may be submitted to the RFC Editor in
          e-mail messages (or as online files).  If you plan to submit a
          document in PostScript please consult the RFC Editor first.

          Note that since the ASCII text version of the RFC is the primary
          version, the PostScript version must match the text version.  The
          RFC Editor must decide if the PostScript version is "the same as"
          the ASCII version before the PostScript version can be published.

    4.  Headers and Footers

       There is the first page heading, the running headers, and the running
       footers.

       4a.  First Page

          Please see the front page of this memo for an example of the front
          page heading.  On the first page there is no running header.  The
          top of the first page has the following items:

          Network Working Group

             The traditional heading for the group that founded the RFC
             series.  This appears on the first line on the left hand side
             of the heading.

          Request for Comments: nnnn

             Identifies this as a request for comments and specifies the
             number.  Indicated on the second line on the left side.  The
             actual number is filled in at the last moment before
             publication by the RFC Editor.

    Postel                                                          [Page 6]

    RFC 1543              Instructions to RFC Authors           October 1993

          Author

             The author's name (first initial and last name only) indicated
             on the first line on the right side of the heading.

          Organization

             The author's organization, indicated on the second line on the
             right side.

          Date

             This is the Month and Year of the RFC Publication. Indicated on
             the third line on the right side.

          Updates or Obsoletes

             If this RFC Updates or Obsoletes another RFC, this is indicated
             as third line on the left side of the heading.

          Category

             The category of this RFC, one of: Standards Track,
             Informational, or Experimental.  This is indicated on the third
             (if there is no Updates or Obsoletes indication) or fourth line
             of the left side.

          Title

             The title appears, centered, below the rest of the heading.

          If there are multiple authors and if the multiple authors are from
          multiple organizations the right side heading may have additional
          lines to accommodate them and to associate the authors with the
          organizations properly.

       4b.  Running Headers

          The running header in one line (on page 2 and all subsequent
          pages) has the RFC number on the left (RFC NNNN), the (possibly a
          shortened form) title centered, and the date (Month Year) on the
          right.

       4c.  Running Footers

          The running footer in one line (on all pages) has the author's
          last name on the left and the page number on the right ([Page N]).

    Postel                                                          [Page 7]

    RFC 1543              Instructions to RFC Authors           October 1993

    5.  Status Section

       Each RFC must include on its first page the "Status of this Memo"
       section which contains a paragraph describing the type of the RFC.

       The content of this section will be one of the three following
       statements.

       Standards Track

          "This document specifies an Internet standards track protocol for
          the Internet community, and requests discussion and suggestions
          for improvements.  Please refer to the current edition of the
          "Internet Official Protocol Standards" (STD 1) for the
          standardization state and status of this protocol.  Distribution
          of this memo is unlimited."

       Experimental

          "This memo defines an Experimental Protocol for the Internet
          community.  This memo does not specify an Internet standard of any
          kind.  Discussion and suggestions for improvement are requested.
          Distribution of this memo is unlimited."

       Informational

          "This memo provides information for the Internet community.  This
          memo does not specify an Internet standard of any kind.
          Distribution of this memo is unlimited."

    6.  Introduction Section

       Each RFC should have an Introduction section that (among other
       things) explains the motivation for the RFC and (if appropriate)
       describes the applicability of the protocol described.

          Some example paragraphs are:

             Protocol

                This protocol is intended to provide the bla-bla service,
                and be used between clients and servers on host computers.
                Typically the clients are on workstation hosts and the
                servers on mainframe hosts.

                or

    Postel                                                          [Page 8]

    RFC 1543              Instructions to RFC Authors           October 1993

                This protocol is intended to provide the bla-bla service,
                and be used between special purpose units such as terminal
                servers or routers and a monitoring host.

             Discussion

                The purpose of this RFC is to focus discussion on particular
                problems in the Internet and possible methods of solution.
                No proposed solutions in this document are intended as
                standards for the Internet.  Rather, it is hoped that a
                general consensus will emerge as to the appropriate solution
                to such problems, leading eventually to the adoption of
                standards.

             Interest

                This RFC is being distributed to members of the Internet
                community in order to solicit their reactions to the
                proposals contained in it.  While the issues discussed may
                not be directly relevant to the research problems of the
                Internet, they may be interesting to a number of researchers
                and implementers.

             Status Report

                In response to the need for maintenance of current
                information about the status and progress of various
                projects in the Internet community, this RFC is issued for
                the benefit of community members.  The information contained
                in this document is accurate as of the date of publication,
                but is subject to change.  Subsequent RFCs will reflect such
                changes.

          These paragraphs need not be followed word for word, but the
          general intent of the RFC must be made clear.

    7.  References Section

       Nearly all RFCs contain citations to other documents, and these are
       listed in a References section near the end of the RFC.  There are
       many styles for references, and the RFCs have one of their own.
       Please follow the reference style used in recent RFCs.  See the
       reference section of this RFC for an example.  Please note that for
       protocols that have been assigned STD numbers, the STD number must be
       included in the reference.

    Postel                                                          [Page 9]

    RFC 1543              Instructions to RFC Authors           October 1993

    8.  Security Considerations Section

       All RFCs must contain a section near the end of the document that
       discusses the security considerations of the protocol or procedures
       that are the main topic of the RFC.

    9.  Author's Address Section

       Each RFC must have at the very end a section giving the author's
       address, including the name and postal address, the telephone number,
       (optional: a FAX number) and the Internet e-mail address.

    10.  Relation to other RFCs

       Sometimes an RFC adds information on a topic discussed in a previous
       RFC or completely replaces an earlier RFC.  There are two terms used
       for these cases respectively, UPDATES and OBSOLETES.  A document that
       obsoletes an earlier document can stand on its own.  A document that
       merely updates an earlier document cannot stand on its own; it is
       something that must be added to or inserted into the previously
       existing document, and has limited usefulness independently.  The
       terms SUPERSEDES and REPLACES are no longer used.

       UPDATES

          To be used as a reference from a new item that cannot be used
          alone (i.e., one that supplements a previous document), to refer
          to the previous document.  The newer publication is a part that
          will supplement or be added on to the existing document; e.g., an
          addendum, or separate, extra information that is to be added to
          the original document.

       OBSOLETES

          To be used to refer to an earlier document that is replaced by
          this document.  This document contains either revised information,
          or else all of the same information plus some new information,
          however extensive or brief that new information is; i.e., this
          document can be used alone, without reference to the older
          document.

          For example:

             On the Assigned Numbers RFCs the term OBSOLETES should be used
             since the new document actually incorporate new information
             (however brief) into the text of existing information and is
             more up-to-date than the older document, and hence, replaces it
             and makes it OBSOLETE.

    Postel                                                         [Page 10]

    RFC 1543              Instructions to RFC Authors           October 1993

       In lists of RFCs or the RFC-Index (but not on the RFCs themselves)
       the following may be used with early documents to point to later
       documents.

       OBSOLETED-BY

          To be used to refer to the newer document(s) that replaces the
          older document.

       UPDATED-BY

          To be used to refer to the newer section(s) which are to be added
          to the existing, still used, document.

    11.  Protocol Standards Process

       See the current "Internet Official Protocol Standards" (STD 1) memo
       for the definitive statement on protocol standards and their
       publication [1].

       The established procedure is that when the IESG completes work on a
       document that is to become a standards track RFC the communication
       will be from the Secretary of the IESG to the RFC Editor.  Generally,
       the documents in question are Internet Drafts.  The communication
       usually cites the exact Internet Draft (by file name) in question.
       The RFC Editor must assume that only that file is to be processed to
       become the RFC.  If the authors have small corrections to the text,
       they should be sent to the RFC Editor separately (or as a "diff"), do
       not send a new version of the document.

    12.  Contact

       To contact the RFC Editor send an email message to

             "RFC-Editor@ISI.EDU".

    13.  Distribution Lists

       The RFC announcements are distributed via two mailing lists: the
       "IETF-Announce" list, and the "RFC-DIST" list.  You don't want to be
       on both lists.

       To join (or quit) the IETF-Announce list send a message to IETF-
       Request@cnri.reston.va.us.

       To join (or quit) the RFC-DIST list send a message to RFC-
       Request@NIC.DDN.MIL.

    Postel                                                         [Page 11]

    RFC 1543              Instructions to RFC Authors           October 1993

    14.  RFC Index

       Several organizations maintain RFC Index files, generally using the
       file name "rfc-index.txt".  The contents of such a file copied from
       one site may not be identical to that copied from another site.

    15.  Security Considerations

       This RFC raises no security issues (however, see Section 6).

    16.  References

       [1]  Postel, J., "Internet Official Protocol Standards", STD 1, RFC
            1540, Internet Architecture Board, October 1993.

    17.  Author's Address

       Jon Postel
       USC/Information Sciences Institute
       4676 Admiralty Way
       Marina del Rey, CA  90292

       Phone: 310-822-1511
       Fax:   310-823-6714
       EMail: Postel@ISI.EDU

    Postel                                                         [Page 12]

    RFC 1543              Instructions to RFC Authors           October 1993

    18.  Appendix - RFC "nroff macros"

       Generally, we use the very simplest nroff features.  We use the "ms"
       macros.  So, "nroff -ms input-file > output-file".  However, we could
       not get nroff to do the right thing about putting a form feed after
       the last visible line on a page and no extra line feeds before the
       first visible line of the next page.  We want:

            last visible line on page i
            ^L
            first visible line on page i+1

       So, we invented some hacks to fix this including a "sed" script
       called "fix.sh" and a "c" program we called "pg" (pg is called from
       fix).  So the command to process the file becomes:

            nroff -ms input-file | fix.sh > output-file

       Now as to the nroff features we actually use, I'll append a sample
       memo, prepared in RFC style.

       The sed script fix.sh is:

            sed -e 's/FORMFEED\[Page/        \[Page/' $* | pg -n5

    The pg program is:

                         ~~~Beginning of pg program~~~

    /* $Header$
     *
     *  Remove N lines following any line that contains a form feed (^L).
     *  (Why can't this be done with awk or sed?)
     *
     *  OPTION:
     *      -n#     Number of lines to delete following each ^L (0 default).
     * $Log$
     */
    #include <stdio.h>
    #define FORM_FEED       '\f'
    #define OPTION          "n:N:"          /* for getopt() */

    extern char *optarg;
    extern int optind;

    main(argc, argv)
    int     argc;
    char    *argv[];

    Postel                                                         [Page 13]

    RFC 1543              Instructions to RFC Authors           October 1993

    {
      int   c,                              /* next input char */
            nlines = 0;                     /* lines to delete after ^L */
      void  print_and_delete();             /* print line starting with ^L,
                                               then delete N lines */

    /* Process option (-nlines) */

      while ((c = getopt(argc, argv, OPTION)) != EOF)
        switch(c)
        {
          case 'n' :
          case 'N' :  nlines = atoi(optarg);
                      break;
        }
    /* READ AND PROCESS CHARS */

      while ((c = getchar()) != EOF)
        if (c == FORM_FEED)
          print_and_delete(nlines);  /* remove N lines after this one */
        else
          putchar(c);                /* we write the form feed */
      exit(0);
    }

    /* Print rest of line, then delete next N lines. */

    void print_and_delete(n)
    int  n;                                 /* nbr of lines to delete */
    {
      int   c,                              /* next input char */
            cntr = 0;                       /* count of deleted lines */

      while ((c = getchar()) != '\n')       /* finish current line */
        putchar(c);
      putchar('\n');                        /* write the last CR */
      putchar(FORM_FEED);

      for ( ; cntr < n; cntr++)
        while ((c = getchar()) != '\n')
          if (c == EOF)
            exit(0);                        /* exit on EOF */
      putchar(c);                           /* write that last CR */
    }
                            ~~~End of pg program~~~

    Postel                                                         [Page 14]

    RFC 1543              Instructions to RFC Authors           October 1993

    .pl 10.0i
    .po 0
    .ll 7.2i
    .lt 7.2i
    .nr LL 7.2i
    .nr LT 7.2i
    .ds LF Waitzman
    .ds RF FORMFEED[Page %]
    .ds CF
    .ds LH RFC 1149
    .ds RH 1 April 1990
    .ds CH IP Datagrams on Avian Carriers
    .hy 0
    .ad l
    .in 0
    Network Working Group                                        D. Waitzman
    Request for Comments: 1149                                       BBN STC
                                                                1 April 1990

    .ce
    A Standard for the Transmission of IP Datagrams on Avian Carriers

    .ti 0
    Status of this Memo

    .fi
    .in 3
    This memo describes an experimental method for the encapsulation of IP
    datagrams in avian carriers.  This specification is primarily useful
    in Metropolitan Area Networks.  This is an experimental, not recommended
    standard.  Distribution of this memo is unlimited.

    .ti 0
    Overview and Rational

    Avian carriers can provide high delay, low throughput, and low
    altitude service.  The connection topology is limited to a single
    point-to-point path for each carrier, used with standard carriers, but
    many carriers can be used without significant interference with each
    other, outside of early spring.  This is because of the 3D ether space
    available to the carriers, in contrast to the 1D ether used by
    IEEE802.3.  The carriers have an intrinsic collision avoidance system,
    which increases availability.  Unlike some network technologies, such
    as packet radio, communication is not limited to line-of-sight
    distance.  Connection oriented service is available in some cities,
    usually based upon a central hub topology.

    Postel                                                         [Page 15]

    RFC 1543              Instructions to RFC Authors           October 1993

    .ti 0
    Frame Format

    The IP datagram is printed, on a small scroll of paper, in
    hexadecimal, with each octet separated by whitestuff and blackstuff.
    The scroll of paper is wrapped around one leg of the avian carrier.
    A band of duct tape is used to secure the datagram's edges.  The
    bandwidth is limited to the leg length.  The MTU is variable, and
    paradoxically, generally increases with increased carrier age.  A
    typical MTU is 256 milligrams.  Some datagram padding may be needed.

    Upon receipt, the duct tape is removed and the paper copy of the
    datagram is optically scanned into a electronically transmittable
    form.

    .ti 0
    Discussion

    Multiple types of service can be provided with a prioritized pecking
    order.  An additional property is built-in worm detection and
    eradication.  Because IP only guarantees best effort delivery, loss of
    a carrier can be tolerated.  With time, the carriers are
    self-regenerating.  While broadcasting is not specified, storms can
    cause data loss.  There is persistent delivery retry, until the
    carrier drops.  Audit trails are automatically generated, and can
    often be found on logs and cable trays.

    .ti 0
    Security Considerations

    .in 3
    Security is not generally a problem in normal operation, but special
    measures must be taken (such as data encryption) when avian carriers
    are used in a tactical environment.

    .ti 0
    Author's Address

    .nf
    David Waitzman
    BBN Systems and Technologies Corporation
    BBN Labs Division
    10 Moulton Street
    Cambridge, MA 02238

    Phone: (617) 873-4323

    EMail: dwaitzman@BBN.COM

    Postel                                                         [Page 16]