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From: Tim Rentsch <tr.17687@z991.linuxsc.com>
Newsgroups: comp.arch
Subject: Re: The Design of Design
Date: Thu, 09 May 2024 22:17:53 -0700
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"Stephen Fuld" <SFuld@alumni.cmu.edu.invalid> writes:

> Scott Lurndal wrote:
>
>> "Stephen Fuld" <SFuld@alumni.cmu.edu.invalid> writes:
>>
>>> Tim Rentsch wrote:
>>>
>>>> The problem it was trying to solve is contained in its name:  Job
>>>> Control Language.  It tacitly accepted the non-interactive batch
>>>> model for what it needed to address.
>>>
>>> You may be right, but correct me if I am wrong, there was no
>>> non-interactive model in the mid 1960s when JCL was devised.
>>
>> BASIC and DTSS was developed in 1963.
>
> Good Point.  So IBM was "guuilty" of vastly mis-understanding and under
> estimating the future importance of interactive users.

Work on System/360 started in 1961 (and in some sense two years
earlier, but let's not get into that).  System/360 and OS/360
were announced in April 1964.  The Dartmouth Time Sharing System
first became operational in early 1964 and wasn't available for
use until after System/360 and OS/360 had been announced and
already had years of development.