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Calculator

Posted: Fri Feb 17, 2017 7:36 am
by Stevenloan
Hi you guys! What do you call this kind of calculator?

http://noithat888.com/includes/print.asp?iData=2862

Thanks a lot!

StevenLoan

Re: Calculator

Posted: Fri Feb 17, 2017 6:22 pm
by BonnieL
Abacus. Never did learn to use one, but they are lovely to look at. :)

Re: Calculator

Posted: Fri Feb 17, 2017 9:48 pm
by Bobinwales
You could call it a counting frame as well.
Wikipedia is not always a reliable fount of knowledge, but in this case it seems to be about right.

Re: Calculator

Posted: Sat Feb 18, 2017 1:19 pm
by tony h
An abacus but to my experience interesting. It isn't a typical Chinese, Japanese or Russian type. Is it Vietnamese?

Re: Calculator

Posted: Sun Feb 19, 2017 3:07 pm
by Stevenloan
BonnieL and Bob : Thank you two very much. tony h : As far as I know, this device belongs to Chinese people. I've seen it in many Chinese movies.

Re: Calculator

Posted: Sun Feb 19, 2017 4:41 pm
by tony h
Stevenloan wrote:BonnieL and Bob : Thank you two very much. tony h : As far as I know, this device belongs to Chinese people. I've seen it in many Chinese movies.
In my experience ...
The Chinese abacus typically has 5 beads on one side and 2 on the other.
The Japanese abacus I have is 5 beads and 2
My Russian abacus is several columns of 10 beads (with the 5th and 6th bead being black) and one column of four beads (white, black, black white) . This abacus has no bar.

But on looking I also see Japanese abacus having 4 and 1 as in your photograph.

Re: Calculator

Posted: Mon Feb 20, 2017 3:38 pm
by Wizard of Oz
Steve & tony, the particular abacus shown in Steve's photo is called a Soroban and is a Japanese abacus hence the 1/4 configuration. A soroban has the same configuration as a Roman abacus. The Chinese suanpan has a 2/5 configuration.

WoZ who wears beads

Re: Calculator

Posted: Tue Feb 21, 2017 10:07 am
by tony h
Woz: you might be amused to know that in the '70s, when I started with proper computers, I used a Chinese abacus to check calculations and register values. The Chinese abacus lends itself to such use as it can calculate in hexadecimal as well as decimal. Although in decimal it has a richer set of techniques available.

Re: Calculator

Posted: Wed Feb 22, 2017 11:21 pm
by Bobinwales
I'm impressed Tony. They have always baffled me.

Re: Calculator

Posted: Sat Feb 25, 2017 10:34 am
by tony h
Bobinwales wrote:I'm impressed Tony. They have always baffled me.
Thank you. I do love the physicality of old calculators. I own a variety of slide rules, abacus and mechanically geared calculators. Favourites include specialist items for calculating resistors, Imperial (£ s d), specific gravity.

It is wonderful to see specifically designed items ingeniously comprised simple sliding parts resolving calculations with such ease and reliability.

Re: Calculator

Posted: Sat Feb 25, 2017 1:39 pm
by Erik_Kowal
Tony, I wonder if you've ever visited Oxford's Museum of the History of Science (http://www.mhs.ox.ac.uk)? The curatorial approach is rather dated, but the museum is stuffed with the kinds of measuring instruments you're keen on.

Re: Calculator

Posted: Sun Feb 26, 2017 1:31 pm
by tony h
Erik_Kowal wrote:Tony, I wonder if you've ever visited Oxford's Museum of the History of Science (http://www.mhs.ox.ac.uk)? The curatorial approach is rather dated, but the museum is stuffed with the kinds of measuring instruments you're keen on.
No I haven't but now I intend to do so.

Re: Calculator

Posted: Thu Mar 09, 2017 3:02 pm
by Wizard of Oz
tony a late reply but I am not so much amused as amazed. Calculators saved my life as I never did master the slide rule or such.

WoZ pressing not sliding