Yes, I have downloaded to my computers virtual slide rules and I used them for many computations not involving a matrix of numbers to be crunched, for that I...
oddly enough,t no one has pointed out that using RPN you don't need parenthesis in any equation to calculate, e.g. (2+3)*(3+5^(3*2))/(10+12) - in RPN this is a...
I have "slide rule, science, medical, watches, ..." set as a Favorite. Selecting "slide rule" on the web page then seems to bring up the "long list" being...
I was trying to determine who cooked up the birkana number symbols. Lots of google hits for birkana number symbols, but none seem to reveal the origin. I don't...
The Sinclair Scientific was introduced in 1974 and used RPN on a custom programmed TI TMC0805NC. This chip was designed by TI as a normal 4 function calculator...
Steve Rooke
sar10538@...
Nov 12, 2009 12:21 pm
38153
Hi Bob, I had to get my Hemmi No. 149A to look because that's the first rule that came to mind when you said SI scale. It's really easy to use the SI and C/D...
I assume that Casio wasn't using the intel floating-all-over-the-place numeric co-processor. 8^) ... -- take care, -- Vince Speed of light is 1 799 884 800 000...
I read an article several years back claiming the original HP-35 was programmed internally with a less-than-2K ROM; I think the number was slightly over 1500. ...
I use both approaches myself. But recently I was getting over a thousand listings with the 'real slide rule heading' method you mention. Now it is back within...
I believe that you will find many of them still being sold mostly as "printing calculators" and most of them have += keys. Take a look at Best Buy or Amazon. ...
But you can have your very own. Just swipe the images and javascript file off of his page. Like I just did. If he would do the other side I would consider...
Sorry, I may not agree with you. If multiplication first, I set the mulitplicand on D, then align multiplier on CI for multiplication...this absolutely avoid...
The first or very early Casios did not compute the % value correctly! This was such an annoyance to me that I threw my first one in the trash. marion...
Jon, In my experience, the number of "slide rules" differs by how I approach eBay. Often, I input the search term "slide rules" and get a list that is ...
Thanks to Stefan Vorkoetter for confirming my "suspicions". Of course, I was being facetious in asking how to obtain an actual Birkana. (The smiley face...
This can be done with the % key on Casio/CANON/Sharp Calculators. They all gave the answer immediately. (Though they may be different). I know what you mean as...
... I think it only exists in the virtual world (and perhaps in Middle Earth). I don't think the rule pictured on that site ever existed in physical form. The...
Very true. In fact the oldest (and still on the market) and best selling biz calculator is history is the HP-12C. It is completely RPN. I am a dyed-in-the-wool...
Of course, it gets easier with practice. I started using this because doing the mental approximation to place the decimal point seems difficult to me. To...
Absolutely! It's polish notation, PN, IE. multiply(9, 7), as opposed to RPN, IE. (9, 7)multiply. You need to know what function is being performed first so...
Steve Rooke
sar10538@...
Nov 11, 2009 11:55 am
38132
Thanks, it seems a little bit complicated for me. (Taking care of the tally (number of digits, the portion of stator/slider and calculation per se at the same...
I've always found RPN easier myself, but I have to disagree with someone else about slide rules - a slide rule is neither infix (algebraic) nor postfix (RPN),...
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