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

[John Day]

No one took those seriously. 
TP0 was for CCITT SGVIII, TP1 was for CCITT SGVII, TP2 was for the Brits who had to use X.25, and TP3 was for the Germans.

No one paid them any mind. The real focus was on TP4 which was a major advance because it adopted Watson’s insight on synchronization which made it much simpler and more secure.

Take care,
John

> On Sep 28, 2025, at 19:21, Dave Crocker <dhc at dcrocker.net> wrote:
> 
> On 9/28/2025 4:13 PM, John Day via Internet-history wrote:
>> The OSI vision was, if anything, Ethernet (an ISO standard), CLNP, TP4, and ACSE.
> That sounds reasonable, except for TP0, TP1, TP2, and TP3.
> 
> 
> 
> and the various CONS alternatives to CLNP.
> 
> OSI went for the union of everybody's wish lista.  The Internet went for the intersection.
> 
> d/
> 
> -- 
> Dave Crocker
> 
> Brandenburg InternetWorking
> bbiw.net
> bluesky: @dcrocker.bsky.social
> mast: @dcrocker at mastodon.social