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Re: [OM] Godspeed, Neil Armstrong

Subject: Re: [OM] Godspeed, Neil Armstrong
From: "Jim Nichols" <jhnichols@xxxxxxxxxxxxx>
Date: Mon, 27 Aug 2012 20:22:22 -0500
Hi Mike,

You are really making me feel old!  I have a couple of TIs that my sons used 
in college, but my personal favorite, a gift from my family many years ago, 
is my HP32S  (RPN Scientific).  I change the batteries every couple of 
years, and it just keeps on truckin'.

Jim Nichols
Tullahoma, TN USA
----- Original Message ----- 
From: <usher99@xxxxxxx>
To: <olympus@xxxxxxxxxxxxxxxxx>
Sent: Monday, August 27, 2012 7:10 PM
Subject: Re: [OM] Godspeed, Neil Armstrong


>>>My TI-35+ is
>> >>going on 30 years old, but it still works great and sits right next
> to
>
>
> Some calculators die hard.  I have read many still love the HP12C
> financial calculator. I believe they are still sold and the relatively
> expensive phone app emulators do well!  I still use my HP 11c and even
> occasionally  my Ti SR52.  I recently bought replacement battery packs
> for it and my Dad's HP45.  I was spoiled rotten as a kiddie as we often
> had a giant 4 fxn calculator (forgot who made it) and could ck long
> division on it just after I learned how.  This was pre LED's and had
> weird neon tube thingies for the display and cost as much as a car.  My
> Dad brought it home from work.
>
> I have a meter?  long slide  rule at home and an odd spiral one that is
> really cool.  I remember able to get 4 sig. figures at the low end on
> it but didn't really need it for long in junior high or so as the SR10
> or 11's were out.
>
> Oh there are algorithms to keep tack of the "left digits" when using  a
> Slide Rule.  I would use that after keeping track of the order of
> magnitude in Sci notation first, IIRC.
>
> "Rule for multiplication
> If the rule is set with the slide protruding at the left-hand end of
> the stock, the number of digits in the answer is the sum of the digits
> of the factors. If the slide is protruding at the right-hand end, the
> number of digits in the product is one less than the sum of the digits
> of the factors.
>
> Rule for division
> If, when dividing, the slide protrudes at the left-hand end of the
> stock, the number of digits in the result is found by subtracting the
> number of digits in the divisor from the number in the dividend. If the
> slide protrudes to the right the number of digits in the result will be
> one greater that the difference between the numbers of digits in the
> dividend and divisor respectively."
>
> Any one else have a spiral slide rule? Mike
>
>
>
>
>
> -- 
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> 


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