I have reviewed this document as part of the Operational directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written primarily for the benefit of the operational area directors. Document editors and WG chairs should treat these comments just like any other last call comments.   I think this document is written very clear and is an very good reference guide to all the transport layer protocols being developed by IETF, good resource to Wikipedia.   IMHO, the document would be more useful (in IETF) to show which applications are actually using those less popular protocols, like FLUTE, NORM, DCCP, SCTP, RTP etc. Who uses FLUTE? NORM? DCCP? I understand that SS7 uses SCTP, but are there any others using SCTP?   The document missed the DCTCP, the GTP transport layer protocol (used within  GSM  and  UMTS  networks).     Not sure why ICMP is listed in parallel with TCP/UDP. If ICMP is included, many others should be included,     Linda Dunbar