[ih] when did APRANET -TIPs become known as -TACs

[John Day]

A site with more than one host connected to the IMP would regularly have a hyphen between the organization name and the name of the specific lab or whatever it was, e.g. MIT-Multics, MIT-AI.

Sounds like you don’t have enough to do.

> On Apr 19, 2025, at 18:33, Alexander McKenzie via Internet-history <internet-history at elists.isoc.org> wrote:
> 
> Ah, you are referring to Host names.  There wasm for example, a TIP at BBN
> known officially as BBN-TIP. The dash was part of the Host name, not part
> of the word "TIP".
> 
> Cheers,
> Alex McKenzie
> 
> On Saturday, April 19, 2025 at 06:10:31 PM EDT, the keyboard of geoff
> goodfellow via Internet-history <internet-history at elists.isoc.org> wrote:
> 
> 
> so BOTH the TIPs and TAC's had the -TIP and -TAC name notation, e.g. viz.:
> 
> 243,ACCAT-TIP,TIP,USER,NEW
> in
> ;[SRI-CSL]<GEOFF2>HSTNAM.TXT  (Kept by Geoff at SRI-CSL)
> ;Last update: 4-Aug-82
> as EXCERPTED from:
> https://pdp-10.trailing-edge.com/bb-d868e-bm_tops20_v41_2020_dist_1of2/01/new-system/hstnam.txt.html
> &
> https://pdp-10.trailing-edge.com/BB-H137C-BM/06/new-system/hstnam.txt.html
> 
> HOST ACCAT-TAC, 2/35,USER,TAC,C30,[NELC-TIP]
> ; Last updated: MRC 2/1/83
> as EXCERPTED from:
> https://github.com/ttkzw/hosts.txt/blob/master/pub/hosts/19830201/HOSTS.TXT
> 
> and some even had both (which must have been during the -TIP to -TAC naming
> transition), viz.:
> 10.2.0.35      accat-tac nelc-tip
> 10.2.0.31      cca-tac cca-tip
> as EXCERPTED from:
> https://www.tuhs.org/cgi-bin/utree.pl?file=4.2BSD/usr/src/etc/htable/hosts
> 
> geoff
> 
> 
> On Sat, Apr 19, 2025 at 2:35 PM Alexander McKenzie via Internet-history <
> internet-history at elists.isoc.org> wrote:
> 
>> They became TACs when the management of ARPAnet switched from DARPA to
> DCA
>> and login control via user passwords was implemented.  The management
> shift
>> happened in mid-1976 and the login control somewhat later. I've never seen
>> the dash notation before and I don't think that is anything other than a
>> typo.
>> 
>> Cheers,
>> Alex McKenzie
>> 
>> On Saturday, April 19, 2025 at 05:19:44 PM EDT, the keyboard of geoff
>> goodfellow via Internet-history <internet-history at elists.isoc.org> wrote:
>> 
>> 
>> and WHY the dash -TIP to -TAC name change?
>> 
>> --
>> Geoff.Goodfellow at iconia.com
>> living as The Truth is True
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>> 
>> 
> 
> -- 
> Geoff.Goodfellow at iconia.com
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