On 2009-09-03, Albert van der Horst <alb...@spenarnc.xs4all.nl> wrote:
> In article <mailman.591.1251468775.2854.python-l...@python.org>,
> MRAB <pyt...@mrabarnett.plus.com> wrote:
>>Steven D'Aprano wrote:
><SNIP>
>>> Obviously I can't speak for Ken Thompson's motivation in creating this
>>> feature, but I'm pretty sure it wasn't to save typing or space on
>>> punchcards. Even in 1969, hex was more common than octal, and yet hex
>>> values are written with 0x. My guess is that he wanted all numbers to
>>> start with a digit, to simplify parsing, and beyond that, it was just his
>>> programming style -- why call the copy command `copy` when you could call
>>> it `cp`? (Thompson was the co-inventor of Unix.)
>>>
>>Maybe it was because they were working on minicomputers, not mainframes,
>>so there was less processing power and storage available.
>
> Not just any minicomputers: PDP11. Octal notation is friendly with
> the PDP11 instruction set.
Indeed. Octal was the way that all of the DEC PDP-11 sw tools
displayed machine code/data.
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