[ih] The classful <net>.<host> IPv4 address format (early Internet demos)

[Barbara Denny]

 For those not familiar with the diagrams for 1976 and 1977, I finally found the message with the link to the write-up that includes legible demo diagrams.  The '76 demo is the diagram that talks about the weekly report.
https://ed-thelen.org/comp-hist/CORE-3-1-SRI-TCP-IP.html
Not sure why my message below lost the blank lines between the paragraphs.  
barbara
    On Sunday, September 14, 2025 at 11:07:19 PM PDT, Barbara Denny via Internet-history <internet-history at elists.isoc.org> wrote:  
 
  Yes great find!!! I wonder where these copies came from. It isn't a complete set.   They do seem to be recently scanned.  I certainly didn't get any of them, even the ones like the X-NET cross-net debugger (PRTN 141)  which I used.  Mike Beeler wrote the PRTN and I am pretty sure he just talked to me about how to use it. I probably got a minimal cheat sheet too.
Just to let you know, I noticed the X-NET debugger document specifies the convention for octal versus decimal. It follows what we saw for IEN 21  ( TCPv3). 
BTW,  I don't think gateways were a separate piece of hardware yet. It was still in the packet radio station. The diagram for the 1976 demo makes this clearer.  I  know I sent a prior message with a link to this diagram but I am having a little bit of trouble locating it right now.  Searching email in yahoo is not great so maybe I will have more luck tomorrow. Maybe I didn't send this link to the list regarding the '76 demo. It has some nice shots of Zotts. It is nice the google search understands Zotts is Alpine Inn.
https://www.theguardian.com/technology/2016/jul/15/how-the-internet-was-invented-1976-arpa-kahn-cerf?CMP=share_btn_link
barbara 

    On Sunday, September 14, 2025 at 06:21:25 PM PDT, Jack Haverty via Internet-history <internet-history at elists.isoc.org> wrote:  
 
 Good find!  Yes, I expanded the acronym incorrectly.

It looks like these were scanned from someone's paper copies, rather 
than being captured from some website.  I'm still curious about why 
PRTNs were treated differently from other similar notes such as IENs and 
RFCs, which were accessible online at SRI-NIC even in the 1970s.

According to a reliable source, namely a plaque at Rossotti's Alpine Inn 
in Portola Valley, the "Beginning of the Internet Age" occurred on 
August 27, 1976 when an "electronic message ... was sent via a radio 
network to SRI and on through a second network, the ARPANET, to 
Boston.   Full story is here: 
https://computerhistory.org/wp-content/uploads/2019/08/core-2002-02.pdf

So, Packet Radio and ARPANET were the first networks interconnected by 
Gateways to form the Internet.

But IIRC information, e.g., PRTNs, about the Packet Radio work was not 
online like RFCs and IENs.   Anybody remember the reason?

Jack Haverty



On 9/14/25 17:05, Joe Hamelin wrote:
>
> On Sun, Sep 14, 2025 at 9:31 AM Jack Haverty via Internet-history 
> <internet-history at elists.isoc.org> wrote
>
>
>    This user interface was described in documents from SRI. There was a
>    collection of published documents called PRTNs (Packet Radio
>    Technical
>    Notes) that may have been where you saw the TIU address format you
>    described.  Sorry, I don't know where to find PRTNs today.
>    Jack Haverty
>
> If you're thinking of the Packet Radio Temporary Notes they can be 
> found in the DLARC on archive.org <http://archive.org>.
> https://archive.org/details/packet-radio-temporary-notes
> Contact kay at archive.org for more information.  He gave a talk 
> yesterday at the Zero Retries Digital Conference in Everett, WA and 
> mentioned these.
> -Joe
>
> -- 
> Joe Hamelin, W7COM, Portland, OR, +1 360 474 7474