The ARPAnet reached four nodes on this day in 1969 (anyone know their names?); at least one "history" site reckoned the third node was connected in 1977 (and I'm still waiting for a reply to my correction). Well, I can believe that perhaps there were only three left by then... Hmmm... According to my notes, the nodes were UCSB, UCLA, SRI, and Utah. -- Dave
I'd love to know the order of nodes joining and how that was scored. I've been told that UW-Madison "was the 11th IMP on the arpanet" but I'm pretty sure that is not true. My guess is that there are the original IMPs that were arpanet, then there was an expansion to educational sites and Madison was 11 on that. Or something like that. Anyone know? On Thu, Dec 05, 2019 at 11:08:47AM +1100, Dave Horsfall wrote: > The ARPAnet reached four nodes on this day in 1969 (anyone know their > names?); at least one "history" site reckoned the third node was connected > in 1977 (and I'm still waiting for a reply to my correction). Well, I can > believe that perhaps there were only three left by then... > > Hmmm... According to my notes, the nodes were UCSB, UCLA, SRI, and Utah. > > -- Dave > _______________________________________________ > COFF mailing list > COFF at minnie.tuhs.org > https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff -- --- Larry McVoy lm at mcvoy.com http://www.mcvoy.com/lm
Larry McVoy wrote:
> I'd love to know the order of nodes joining and how that was scored.
Some early RFC describe nodes being connected.
For example, RFC 254 says "The MIT PDP-10(AI) system uses the ITS
operating system and is similar to the MIT PDP-10(DMCG) system. At
present the host is not connected to the ARPANET." RFC 342 has it as a
"network user", and in RFC 344 it's updated to a server.
Are the IMP numbers any indication which order they were connected?
On Thu, Dec 5, 2019 at 3:01 AM Lars Brinkhoff <lars at nocrew.org> wrote: > Larry McVoy wrote: > > I'd love to know the order of nodes joining and how that was scored. > > > Are the IMP numbers any indication which order they were connected? > ______________________________________________ It was always my understanding the numbers were the order they were activated by bbn > > -- Sent from a handheld expect more typos than usual -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://minnie.tuhs.org/pipermail/coff/attachments/20191205/0b3a7076/attachment.html>
On 12/4/2019 8:19 PM, Larry McVoy wrote: > I'd love to know the order of nodes joining and how that was scored. There are a number of sites that contain fragments of the history of sites/nodes joining the ARPAnet. Wikipedia's entry for ARPAnet has some of that along with several logical maps of the network (though these stopped including host #'s pretty early on.) One decent concise accounting is at https://www.zakon.org/robert/internet/timeline/ A collection of maps of the ARPAnet over time is available from the Computer History Museum at https://www.computerhistory.org/collections/catalog/102646704 As others have noted the numbers were assigned chronologically starting at UCLA's Sigma-7 system (1) such that the first 4 were: 1: UCLA: Sigma-7 2: SRI: SDS-940 3: UCSB: IBM 360/75 4: Utah: PDP-10 I know Case-10 was node 13 (more colloquially referenced as 15, in octal, which was how we saw the numbers and updated the host table). I've forgotten at this point whether the assignments were documented in RFCs or other assigned numbers documents from the Network Information Center (NIC). > I've been told that UW-Madison "was the 11th IMP on the arpanet" but I'm > pretty sure that is not true. You're correct that it's not true. Not sure when/if UW-Madison was on the ARPAnet. Hosts did get decommissioned and I think the numbers were eventually recycled so it's possible a later site got a lower number but now it's my turn not to be sure. > My guess is that there are the original > IMPs that were arpanet, then there was an expansion to educational sites > and Madison was 11 on that. Or something like that. ARPAnet "vs." educational sites isn't a distinction that existed. The first 4 nodes consisted of 3 educational institutions and a university-affiliated research organization (SRI). In 1971 when there were 23 hosts and 15 IMPs more than half of the organizations were universities though contractors and labs started appearing pretty rapidly. IMPs apart from ARPAnet weren't a thing really. There's a podcast, "50 Things that Made the Modern Economy" that had a fairly recent episode about IMPs that was pretty interesting. Had a economic, Adam Smith-like spin on the emergence of IMPs as an example of specialization in an ecosystem which was a big part of "why IMPs": the network was kept homogeneous among the IMPs and whatever weirdness was associated with the different hosts (mostly) contained to the host-IMP interface. Those first 4 nodes were all pretty different systems. Some differences percolated up to the applications protocols, TELNET's options set was complicated by the heterogeneity of the hosts in a protocol architecture pre-dating things like "presentation layers" in network models. If you peruse the maps at the Computer History museum site you can see some real diversity in the systems. For instance in April 1971 Burroughs had an IMP and a B6500 front-ending the under-construction ILLIAC-IV (later moved to Ames and front-ended by a couple of PDP-10s). PARC's MAXC appears in the mid-1970s. One of the goals in creating the ARPAnet was to provide access to unique resources to a wider research community and you can certainly see a lot of unique systems in those early maps.
Rob Gingell wrote: > 1: UCLA: Sigma-7 > 2: SRI: SDS-940 > 3: UCSB: IBM 360/75 > 4: Utah: PDP-10 [...] > If you peruse the maps at the Computer History museum site you can see > some real diversity in the systems. For instance in April 1971 > Burroughs had an IMP and a B6500 front-ending the under-construction > ILLIAC-IV (later moved to Ames and front-ended by a couple of > PDP-10s). PARC's MAXC appears in the mid-1970s. Maybe this is a good time to ask if anyone knows whether any of those diverse systems has software preserved? Specifically, the implementation of the NCP and 1822 Host-to-IMP protocols?
On Thu, Dec 05, 2019 at 10:20:06AM -0800, Rob Gingell wrote: > On 12/4/2019 8:19 PM, Larry McVoy wrote: > > I'd love to know the order of nodes joining and how that was scored. > > There are a number of sites that contain fragments of the history of > sites/nodes joining the ARPAnet. Wikipedia's entry for ARPAnet has some of > that along with several logical maps of the network (though these stopped > including host #'s pretty early on.) One decent concise accounting is at > https://www.zakon.org/robert/internet/timeline/ That seems to list the 1st 4 and then none? Or did I miss it? > A collection of maps of the ARPAnet over time is available from the Computer > History Museum at > https://www.computerhistory.org/collections/catalog/102646704 Too blurry to read the names.
On 12/5/2019 11:05 AM, Larry McVoy wrote: > On Thu, Dec 05, 2019 at 10:20:06AM -0800, Rob Gingell wrote: >> One decent concise accounting is at >> https://www.zakon.org/robert/internet/timeline/ > > That seems to list the 1st 4 and then none? Or did I miss it? There's another list of the membership (but not the addresses) under 1971 but the descriptions peter out after that. I was doing some digging for old HOSTS.TXT files, one of which would give a roughly chronological order, and a sequence of which would allow for reconstructing the history, but didn't come up with anything. Well, I did find one file from 1973 that seemed to have the information but the trouble is that file was a document scan that stopped after the first page. Once internetworking experiments started there were sequences of "assigned number" RFCs that showed the evolution of internetworking and component networks but I came up empty looking for just the plain old HOSTS.TXT files. >> A collection of maps of the ARPAnet over time is available from the Computer >> History Museum at >> https://www.computerhistory.org/collections/catalog/102646704 > > Too blurry to read the names. Admittedly a couple of the maps are hard to process even with zooming in but a lot of them are very readable even to my old eyes. And yeah, they don't answer the history question except by inference through visual comparison. Just couldn't find anything better.
Maybe some of these hosts files that Lars Brinkhoff gathered together will help: https://github.com/ttkzw/hosts.txt -----Original Message----- From: COFF <coff-bounces at minnie.tuhs.org> On Behalf Of Rob Gingell Sent: Thursday, December 5, 2019 3:41 PM To: Larry McVoy <lm at mcvoy.com> Cc: coff at minnie.tuhs.org Subject: Re: [COFF] ARPAnet now 4 nodes On 12/5/2019 11:05 AM, Larry McVoy wrote: > On Thu, Dec 05, 2019 at 10:20:06AM -0800, Rob Gingell wrote: >> One decent concise accounting is at >> https://www.zakon.org/robert/internet/timeline/ > > That seems to list the 1st 4 and then none? Or did I miss it? There's another list of the membership (but not the addresses) under 1971 but the descriptions peter out after that. I was doing some digging for old HOSTS.TXT files, one of which would give a roughly chronological order, and a sequence of which would allow for reconstructing the history, but didn't come up with anything. Well, I did find one file from 1973 that seemed to have the information but the trouble is that file was a document scan that stopped after the first page. Once internetworking experiments started there were sequences of "assigned number" RFCs that showed the evolution of internetworking and component networks but I came up empty looking for just the plain old HOSTS.TXT files. >> A collection of maps of the ARPAnet over time is available from the Computer >> History Museum at >> https://www.computerhistory.org/collections/catalog/102646704 > > Too blurry to read the names. Admittedly a couple of the maps are hard to process even with zooming in but a lot of them are very readable even to my old eyes. And yeah, they don't answer the history question except by inference through visual comparison. Just couldn't find anything better. _______________________________________________ COFF mailing list COFF at minnie.tuhs.org https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff
On 12/5/19 5:19 PM, amp1ron at gmail.com wrote:
> Maybe some of these hosts files that Lars Brinkhoff gathered together will help:
>
> https://github.com/ttkzw/hosts.txt
Thanks for the pointer. I had come across those. The trouble is, for the
NCP era, there's only one host file in the collection. The rest are all
from the post-Internet transition (and thus the numbers can't be
inferred to convey a probable chronological sequence.)
And for the one from the NCP era, it's the one that only has the first
page and so it's missing a bunch of stuff. (It's not really a HOSTS.TXT
file but a prettified annotated edition with other information, and so
the file in the repository is a PDF of a scanned physical printout.)
Still even that one page adds some information. From the information
exchanged previously we had hosts 1 through 4, and then host 13. And the
likely matches for about two dozen numbers. And the fragment from the
one page in the repository adds 5 (though it's clear from the comments
that it was a recycled number), 9, 12, confirms 13, 14, 15, 16, and then
a smattering of others up to 232.
Some of the liaison names are tickling memories of long ago acquaintances!
I had thought that once upon a time there was an archive of a mid-1970s
TENEX distribution, like 1.33 or 1.34. The distribution might have
embedded a stale HOSTS.TXT file that would have been complete for the
time. But I haven't managed to find it again.
Still none of this really answers Larry's query in a satisfying way. I
imagine somewhere there's just a ledger that has the answer to the
question I thought he posed about who showed up when with what on the
ARPAnet. The collected papers of someone like Jon Postel might have
something of that nature (but a brief search doesn't reveal an archive
literally like that) but then substantial body of his work lives on in
the RFC library.
I see there's a LOT of hosts files in at least several different formats archived on saildart. A duck duck go search for "site:saildart.org hst.net filedate 197" found me lots of files dated in the 1970s. In the first few pages of search results there's this 1974-04-04 file https://www.saildart.org/NAMES%5BNET,SYS%5D3 . At least that's in the mid-70s date range you're looking for. And maybe there are even older files on saildart. I've pulled out the entries from that file with the lowest 20 numbers and ordered them by number. Between number 1 and 23 in that 1974-04-04 file hosts 17, 20, and 22 are missing. So even if hosts hadn't yet been renumbered, by 1974-04-04 it appears some hosts were dropped from at least this file NET.SYS . ; Here we define the names (long and short) of the sites and their numbers X <UCLA-NMC>,NMC,1,0 X <SRI-ARC>,NIC,2,noslf!noelf X UCSB,UCSB,3,0 X UTAH,UTAH,4,noslf!noelf X <BBN-NCC>,NCC,5,noslf!noelf X <MIT-MLTX>,MLTX,6,0 X <RAND-65>,RAND,7,0 X SDC,SDC,8,0 X <HARV-10>,HARV,9,0 X <LL-67>,LL67,10,0 X <SU-AI>,SAIL,11,noelf X <ILL-11>,ILL11,12,0 X CASE,CASE,13,0 X <CMU-10B>,CMU,14,0 X <NASA-AMES>,AMES,15,noslf!noelf X <AMES-67>,AME67,16,0 X RADC,RADC,18,0 X NBS,NBS,19,0 X TINKER,OCAF,21,0 X USC,USC,23,0 -----Original Message----- From: Rob Gingell <gingell at gmail.com> On Behalf Of Rob Gingell Sent: Thursday, December 5, 2019 10:26 PM To: amp1ron at gmail.com; 'Larry McVoy' <lm at mcvoy.com> Cc: coff at minnie.tuhs.org Subject: Re: [COFF] ARPAnet now 4 nodes On 12/5/19 5:19 PM, amp1ron at gmail.com wrote: > Maybe some of these hosts files that Lars Brinkhoff gathered together will help: > > https://github.com/ttkzw/hosts.txt Thanks for the pointer. I had come across those. The trouble is, for the NCP era, there's only one host file in the collection. The rest are all from the post-Internet transition (and thus the numbers can't be inferred to convey a probable chronological sequence.) And for the one from the NCP era, it's the one that only has the first page and so it's missing a bunch of stuff. (It's not really a HOSTS.TXT file but a prettified annotated edition with other information, and so the file in the repository is a PDF of a scanned physical printout.) Still even that one page adds some information. From the information exchanged previously we had hosts 1 through 4, and then host 13. And the likely matches for about two dozen numbers. And the fragment from the one page in the repository adds 5 (though it's clear from the comments that it was a recycled number), 9, 12, confirms 13, 14, 15, 16, and then a smattering of others up to 232. Some of the liaison names are tickling memories of long ago acquaintances! I had thought that once upon a time there was an archive of a mid-1970s TENEX distribution, like 1.33 or 1.34. The distribution might have embedded a stale HOSTS.TXT file that would have been complete for the time. But I haven't managed to find it again. Still none of this really answers Larry's query in a satisfying way. I imagine somewhere there's just a ledger that has the answer to the question I thought he posed about who showed up when with what on the ARPAnet. The collected papers of someone like Jon Postel might have something of that nature (but a brief search doesn't reveal an archive literally like that) but then substantial body of his work lives on in the RFC library.
[-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain, Size: 4099 bytes --] I searched for files on saildart that include the text SRI-ARC . The oldest one I can find is file NET.SYS dated 1973-04-08: https://www.saildart.org/NAMES[NET,SYS]4 It appears to be an older version of the 1974-04-04 file I mentioned in my previous message. My apologies for top-posting. I'll stop posting now as I don’t have any ideas for finding hosts files older than that one. -----Original Message----- From: amp1ron at gmail.com <amp1ron at gmail.com> Sent: Thursday, December 5, 2019 11:19 PM To: 'Rob Gingell' <gingell at computer.org>; 'Larry McVoy' <lm at mcvoy.com> Cc: coff at minnie.tuhs.org Subject: RE: [COFF] ARPAnet now 4 nodes I see there's a LOT of hosts files in at least several different formats archived on saildart. A duck duck go search for "site:saildart.org hst.net filedate 197" found me lots of files dated in the 1970s. In the first few pages of search results there's this 1974-04-04 file https://www.saildart.org/NAMES%5BNET,SYS%5D3 . At least that's in the mid-70s date range you're looking for. And maybe there are even older files on saildart. I've pulled out the entries from that file with the lowest 20 numbers and ordered them by number. Between number 1 and 23 in that 1974-04-04 file hosts 17, 20, and 22 are missing. So even if hosts hadn't yet been renumbered, by 1974-04-04 it appears some hosts were dropped from at least this file NET.SYS . ; Here we define the names (long and short) of the sites and their numbers X <UCLA-NMC>,NMC,1,0 X <SRI-ARC>,NIC,2,noslf!noelf X UCSB,UCSB,3,0 X UTAH,UTAH,4,noslf!noelf X <BBN-NCC>,NCC,5,noslf!noelf X <MIT-MLTX>,MLTX,6,0 X <RAND-65>,RAND,7,0 X SDC,SDC,8,0 X <HARV-10>,HARV,9,0 X <LL-67>,LL67,10,0 X <SU-AI>,SAIL,11,noelf X <ILL-11>,ILL11,12,0 X CASE,CASE,13,0 X <CMU-10B>,CMU,14,0 X <NASA-AMES>,AMES,15,noslf!noelf X <AMES-67>,AME67,16,0 X RADC,RADC,18,0 X NBS,NBS,19,0 X TINKER,OCAF,21,0 X USC,USC,23,0 -----Original Message----- From: Rob Gingell <gingell at gmail.com> On Behalf Of Rob Gingell Sent: Thursday, December 5, 2019 10:26 PM To: amp1ron at gmail.com; 'Larry McVoy' <lm at mcvoy.com> Cc: coff at minnie.tuhs.org Subject: Re: [COFF] ARPAnet now 4 nodes On 12/5/19 5:19 PM, amp1ron at gmail.com wrote: > Maybe some of these hosts files that Lars Brinkhoff gathered together will help: > > https://github.com/ttkzw/hosts.txt Thanks for the pointer. I had come across those. The trouble is, for the NCP era, there's only one host file in the collection. The rest are all from the post-Internet transition (and thus the numbers can't be inferred to convey a probable chronological sequence.) And for the one from the NCP era, it's the one that only has the first page and so it's missing a bunch of stuff. (It's not really a HOSTS.TXT file but a prettified annotated edition with other information, and so the file in the repository is a PDF of a scanned physical printout.) Still even that one page adds some information. From the information exchanged previously we had hosts 1 through 4, and then host 13. And the likely matches for about two dozen numbers. And the fragment from the one page in the repository adds 5 (though it's clear from the comments that it was a recycled number), 9, 12, confirms 13, 14, 15, 16, and then a smattering of others up to 232. Some of the liaison names are tickling memories of long ago acquaintances! I had thought that once upon a time there was an archive of a mid-1970s TENEX distribution, like 1.33 or 1.34. The distribution might have embedded a stale HOSTS.TXT file that would have been complete for the time. But I haven't managed to find it again. Still none of this really answers Larry's query in a satisfying way. I imagine somewhere there's just a ledger that has the answer to the question I thought he posed about who showed up when with what on the ARPAnet. The collected papers of someone like Jon Postel might have something of that nature (but a brief search doesn't reveal an archive literally like that) but then substantial body of his work lives on in the RFC library.
> From: Lars Brinkhoff >> PARC's MAXC appears in the mid-1970s. > Maybe this is a good time to ask if anyone knows whether any of those > diverse systems has software preserved? Specifically, the > implementation of the NCP and 1822 Host-to-IMP protocols? Both MAXC's were PDP-10 re-implementations, and ran TENEX. So the basic system is still around, not sure if they had any interesting local hacks (well, probably PUP support; MIT tried to put it in MIT-XX, so it may still exist on thats backup tapes). > From: Rob Gingell gingell at computer.org > A collection of maps of the ARPAnet over time is available from the > Computer History Museum Interesting; I also have a large collection of maps: http://mercury.lcs.mit.edu/~jnc/tech/arpanet.html#Maps all with hi-res versions (click on the thumbnails). Some of the ones at the CHM I don't have, but the coverage time-wise is similar. I also have a modest collection of hosts.txt files, ranging from Jul-77 to Apr-94. > I've forgotten at this point whether the assignments were documented in > RFCs or other assigned numbers documents from the Network Information Center The first 'Assigned numbers' RFC was #739, from November 1977. It never contained host addresses. There were a very few early RFC's which contained host adresses (#226, #229, #236), but pretty quickly host addresses were done via the hosts.txt file, distributed from the NIC. (Given the churn rate, using RFC's didn't make sense.) Early RFCs about this are #606 and #627. There were a bunch of RFC's that reported on 'host status' (e.g. how their software was doing), but their goal was different. PS: A number of people are leaving out the definite article before 'ARPANET'; this seems to be popular these days (especially in the UK it seems, not sure why), but it is incorrect. Also, the correct spelling is all capitals (check e.g. through old RFCs). Until of course the AP gets their hands on it (I'm breathlessly awaiting their announcement that the U.S. President's reference is to be referred to as the 'white house'). Noel
On Fri, Dec 06, 2019 at 12:33:38PM -0500, Noel Chiappa wrote:
> Interesting; I also have a large collection of maps:
>
> http://mercury.lcs.mit.edu/~jnc/tech/arpanet.html#Maps
And there it is, October 1981, UWISC is on the arpanet. Looks like there
were about 70 IMPs at the time.
This is awesome info Noel, thanks!
Noel Chiappa wrote:
> > Maybe this is a good time to ask if anyone knows whether any of those
> > diverse systems has software preserved? Specifically, the
> > implementation of the NCP and 1822 Host-to-IMP protocols?
>
> Both MAXC's were PDP-10 re-implementations, and ran TENEX. So the
> basic system is still around
That's kind of the thing. All NCP implementations I know about are for
DEC computers. Nothing for IBM, SDS, etc.
[-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain, Size: 1995 bytes --] > On 2019, Dec 6, at 12:33 PM, Noel Chiappa <jnc at mercury.lcs.mit.edu <mailto:jnc at mercury.lcs.mit.edu>> wrote: > >> From: Lars Brinkhoff > >>> PARC's MAXC appears in the mid-1970s. > >> Maybe this is a good time to ask if anyone knows whether any of those >> diverse systems has software preserved? Specifically, the >> implementation of the NCP and 1822 Host-to-IMP protocols? > > Both MAXC's were PDP-10 re-implementations, and ran TENEX. So the basic > system is still around, not sure if they had any interesting local hacks > (well, probably PUP support; MIT tried to put it in MIT-XX, so it may > still exist on thats backup tapes). > I am pretty sure that the NCP implementation for the MAXCs was the TENEX version, with local mods by Ed Taft. I designed the Alto BBN-1822 interface, which was used for connecting to the Bay Area Packet Radio network and also used for PARC-MAXC2. MAXC1 had a Nova as the front end, about which I know nothing, but MAXC2 used an Alto. Both machines were 40 bit word microcoded machines programmed to be PDP-10s. Corporate wanted PARC to use SDS but the CSL folks wanted a 10, so they had to build one. The software specifically for the Alto 1822 survives, oddly enough, because Marc Verdiell (CuriousMarc)’s Alto Restoration project showed my old 1822 development disk pack in https://www.youtube.com/watch?v=LxFv2JNNW-A <https://www.youtube.com/watch?v=LxFv2JNNW-A> I found the bits at http://xeroxalto.computerhistory.org/Indigo/Alto-1822/.index.html <http://xeroxalto.computerhistory.org/Indigo/Alto-1822/.index.html> I only tested my own code up to successful loopback to the local IMP, then Ed took over. I did the low level code for the PRNet interface, which was not NCP, and hooked it up to Hal Murray’s Mesa implmentation of the Pup stack. -Larry -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://minnie.tuhs.org/pipermail/coff/attachments/20191208/744dcfb5/attachment.html>
The ARPAnet reached four nodes on this day in 1969; at least one "history" site reckoned the third node was connected in 1977 (and I'm still waiting for a reply to my correction). Well, I can believe that perhaps there were only three left by then... According to my notes, the nodes were UCSB, UCLA, SRI, and Utah. -- Dave
> The ARPAnet reached four nodes on this day in 1969 .. > the nodes were UCSB, UCLA, SRI, and Utah. Yeah; see the first map here: http://www.chiappa.net/~jnc/tech/arpageo.html Missing maps gratefully received! Noel
On Sat, 5 Dec 2020, Noel Chiappa wrote: > > The ARPAnet reached four nodes on this day in 1969 .. the nodes were > > UCSB, UCLA, SRI, and Utah. > > Yeah; see the first map here: > > http://www.chiappa.net/~jnc/tech/arpageo.html Yep; I know that first map well :-) For the newbies here, the ARPAnet was the predecessor of the Internet (no, it didn't spring from the brow of Zeus, nor Billy Gates), and what we now call "routers" were then IMPs (look it up). > Missing maps gratefully received! Indeed; history needs to be kept alive, lest it die. -- Dave
I like a challenge although it wasn't really much of it. A simple arpa imp in yahoo spilled the beans :-) "The Interface Message Processor (IMP) was the packet switching node used to interconnect participant networks to the ARPANET from the late 1960s to 1989. It was the first generation of gateways, which are known today as routers.[1][2][3] An IMP was a ruggedized Honeywell DDP-516 minicomputer with special-purpose interfaces and software.[4] In later years the IMPs were made from the non-ruggedized Honeywell 316 which could handle two-thirds of the communication traffic at approximately one-half the cost.[5] An IMP requires the connection to a host computer via a special bit-serial interface, defined in BBN Report 1822. The IMP software and the ARPA network communications protocol running on the IMPs was discussed in RFC 1, the first of a series of standardization documents published by the Internet Engineering Task Force (IETF)." https://en.wikipedia.org/wiki/Interface_Message_Processor Cheers, uncle rubl From: Dave Horsfall <dave at horsfall.org> To: Computer Old Farts Followers <coff at tuhs.org> Cc: Bcc: Date: Wed, 9 Dec 2020 13:41:11 +1100 (EST) Subject: Re: [COFF] ARPAnet now 4 nodes On Sat, 5 Dec 2020, Noel Chiappa wrote: > The ARPAnet reached four nodes on this day in 1969 .. the nodes were > UCSB, UCLA, SRI, and Utah. Yeah; see the first map here: http://www.chiappa.net/~jnc/tech/arpageo.html Yep; I know that first map well :-) For the newbies here, the ARPAnet was the predecessor of the Internet (no, it didn't spring from the brow of Zeus, nor Billy Gates), and what we now call "routers" were then IMPs (look it up). Missing maps gratefully received! Indeed; history needs to be kept alive, lest it die. -- Dave
The ARPAnet reached four nodes on this day in 1969; at least one "history" site reckoned the third node was connected in 1977 (and I'm still waiting for a reply to my correction). Well, I can believe that perhaps there were only three left by then... According to my notes, the nodes were UCSB, UCLA, SRI, and Utah. -- Dave _______________________________________________ COFF mailing list COFF@minnie.tuhs.org https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff