[ih] Internet Protocol Implementation Guide

[David Finnigan]

On 20 Aug 2025 4:17 pm, Barbara Denny via Internet-history wrote:
> Quite some time ago I sent email out with links to the handbooks
> produced by the NIC at SRI. I don't remember if that email also
> included the Internet Protocol Implementation Guide.  Sending this
> message in case this document wasn't included.
> https://apps.dtic.mil/sti/tr/pdf/ADA153624.pdf
>  The end of the document has an interesting snapshot of the status of
> TCP/IP implantations as of June 8, 1982.
> barbara

While looking at the sources for some early TCP implementations, I 
noticed that some of them will process most TCP controls out of order 
(except FIN), so long as the segment sequence fits within the receive 
window. Segment text is always kept in sequence to be delivered to the 
user in correct order, of course.

Who was the one to notice that this was possible, when RFC 793 states 
that segments "are generally queued and processed in sequence number 
order" ?