RPN article on Economist web site

RPN article on Economist web site - Printable Version

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RPN article on Economist web site - Roger Ward - 04-04-2014 07:18 AM

Small RPN and HP article from the Babbage blog on the Economist.com website

http://www.economist.com/blogs/babbage/2014/03/difference-engine-1

RE: RPN article on Economist web site - walter b - 04-04-2014 07:32 AM

For Polish sausages, I prefer infix Wink

RE: RPN article on Economist web site - Thomas Klemm - 04-04-2014 07:58 AM

[Image: rps.png]

xkcd

RE: RPN article on Economist web site - Massimo Gnerucci - 04-04-2014 08:08 AM

(04-04-2014 07:18 AM)Roger Ward Wrote: Small RPN and HP article from the Babbage blog on the Economist.com website

http://www.economist.com/blogs/babbage/2014/03/difference-engine-1

Thank you.

Quote:The sausage conundrum is something only mathematicians, programmers, engineers and financial planners of a certain age could love

[emphasis added]

Alas...

RE: RPN article on Economist web site - [kby] - 04-04-2014 08:10 AM

So…which HP is the man in the picture using?

RE: RPN article on Economist web site - Steve Simpkin - 04-04-2014 08:32 AM

(04-04-2014 08:10 AM)[kby] Wrote: So…which HP is the man in the picture using?

The picture is pretty low res but I think it may be a HP-65.

RE: RPN article on Economist web site - walter b - 04-04-2014 08:50 AM

That's obviously an HP-35. Smile

RE: RPN article on Economist web site - HP67 - 04-04-2014 01:12 PM

(04-04-2014 07:58 AM)Thomas Klemm Wrote:
xkcd

No sauerkraut? That's just wrong!

RE: RPN article on Economist web site - Gerson W. Barbosa - 04-04-2014 03:30 PM

"In RPN, the expression is read unambiguously as 234*+123*+/."

This doesn't make any sense to me... Are blank spaces any expensive?

RE: RPN article on Economist web site - [kby] - 04-04-2014 05:07 PM

It's not a -65…lower right key on a -65 is R/S and it's black. I thought maybe a -67 (of course the guy's thumb covers where the card slot would be) but it doesn't have a light colored upper right corner key (neither does the -65). The only ones that have a light colored upper right corner key are a -35 and a -45, as far as I can tell. I would not have guessed them initially since I'd expect the case to look darker (they are both black), but I'm having to lean toward the -35, as it also looks like there are key legends above he function keys.-kby

RE: RPN article on Economist web site - Alvaro - 04-04-2014 07:09 PM

(04-04-2014 07:18 AM)Roger Ward Wrote: Small RPN and HP article from the Babbage blog on the Economist.com website

http://www.economist.com/blogs/babbage/2014/03/difference-engine-1

(04-04-2014 07:58 AM)Thomas Klemm Wrote:
xkcd

LOL

RE: RPN article on Economist web site - Matt Agajanian - 04-04-2014 07:34 PM

Thanx for the story. Great read. Perhaps some of you remember this one:

Dented and duct-taped, old HP calculators still beloved by planners

http://touch.latimes.com/#section/-1/article/p2p-77137179/

RE: RPN article on Economist web site - Gene - 04-04-2014 09:18 PM

Methinks the picture is an HP 35

RE: RPN article on Economist web site - Gerson W. Barbosa - 04-04-2014 10:02 PM

(04-04-2014 09:18 PM)Gene Wrote: Methinks the picture is an HP 35

HP-35 Version B, and the display shows 11.9547 -99 Smile

http://h20331.www2.hp.com/Hpsub/images/35_eng_gray.jpg

RE: RPN article on Economist web site - [kby] - 04-04-2014 10:11 PM

Thanks; I did think it looked a lot like an HP publicity photo.

RE: RPN article on Economist web site - Gerson W. Barbosa - 04-04-2014 10:21 PM

(04-04-2014 10:11 PM)[kby] Wrote: Thanks; I did think it looked a lot like an HP publicity photo.

You're welcome!

https://www.google.com/search?q=HP-35&espv=210&es_sm=93&tbm=isch&tbo=u&source=univ&sa=X&ei=1S4_U-XaCeLN0AGxs4CQDQ&ved=0CC4QsAQ&biw=1280&bih=705#q=hp-35&tbm=isch&tbs=isz:l&imgdii=_

Scroll down to the next row then click on the blond lady holding a 35 :-)

RE: RPN article on Economist web site - Alvaro - 04-10-2014 06:39 PM

How many days of live has that RPN left?

RE: RPN article on Economist web site - Matt Agajanian - 04-10-2014 06:48 PM

(04-04-2014 10:21 PM)Gerson W. Barbosa Wrote:
(04-04-2014 10:11 PM)[kby] Wrote: Thanks; I did think it looked a lot like an HP publicity photo.
You're welcome!

https://www.google.com/search?q=HP-35&espv=210&es_sm=93&tbm=isch&tbo=u&source=univ&sa=X&ei=1S4_U-XaCeLN0AGxs4CQDQ&ved=0CC4QsAQ&biw=1280&bih=705#q=hp-35&tbm=isch&tbs=isz:l&imgdii=_

Scroll down to the next row then click on the blond lady holding a 35 :-)

If, after you click on that pic, you scroll through the other pics, you'll come across this:

How the HP35 Calculator Killed the Slide Rule and Made an IT Giant

http://mobile.eweek.com/c/a/Desktops-and-Notebooks/How-the-HP35-Calculator-Killed-the-Slide-Rule-and-Made-an-IT-Giant-773270/