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[ih] NCP and TCP implementations

On 3/10/2020 11:53 AM, Bernie Cosell via Internet-history wrote:
>> Am I right in inferring that the key driver behind the design decision
>> was cost rather than elegance?
> no.? cost wasn't the issue.? in fact elegance was. 

My subjective view, at the time, was the the existence of a single 
integrated device for terminal access was extremely helpful in growing 
the user population of the early Arpanet.? Juggling two devices -- IMP 
and a separate host -- for sites needing access but not really having a 
machine or operator cycles to spare, would have been a significant 
barrier to entry.

Small tidbit:

As part of my job doing user support at the UCLA CS site, I got tasked 
with helping Einar Stefferud get started using access.? He didn't access 
through our system but had other arrangements; I just had to help.

One day he calls me up and says that he can't send email.? He was using 
Tenex.? I don't remember whether we were yet into the RD/BananaRD/MSG 
world yet, but in any case, sending was done with Sndmsg.

So I ask him to describe the problem and he says he types the 
destination address and the system responded with "Bad".

I told him he needed to enter at-sign (@) twice.? I felt quite proud of 
realizing the TIP was intercepting the the at-sign.? As I recall, the 
TIP was the only system on the net that gave 'bad' as an error message...


Dave Crocker
Brandenburg InternetWorking