Your choice of calculator at work


Do you use company issued calculators or do you bring your HP at work?

I use my HP-10bII for my part.


I use Excel to perform calculations. It has many built-in functions (including statistical ones), displays grid of data and can run very powerful macros programmed in Visual BASIC.

Any HP calculator can top that? I DON'T THINK SO!



I'm an Excel power user and there always comes a time when you need to reach for a good old calculator.


Mine is a 32S or the 35S. I have some of my more common routines programmed in the calcs, so I can give a quick answer in a meeting if needed.

I use Excel a lot too, just remember that Excel & VBA/Excel use binary FP, thus recreating programs from your fav HP in VBA may result in a slightly different answer akin to Free42Binary. (Unless you redim your vars to Decimal type).


I use EXCEL a lot but use my private HP-48GX as well. On some days I even bring my HP-41CX - this is then a bit like sunday. We bought the HP-35s for our department and most engineers like it. I prefer the older HPs jut for the better keys. The keys are key ;-) to reliable result in my opinion. I've had most of the newer calcs and dumped them all after a while for the bad keys.


Oh come now, I think a 200LX running Lotus 123 2.4 is plenty up to the task. ;) It certainly beats the pants off any Windows CE version of Excel that's been released, and also trounces the Psion's spreadsheet! I often have mine in my computer bag for this reason.

I also keep a 48SX on my desk, and usually carry my 48GX and 17bii with me. (Though the 17bii becomes redundant when the 200LX is on board.)


Free42. But I'm in front of my computer ALL day, so it makes sense.


At work I use both the HP-50g and the HP-33s.

I really prefer the 33s as it's much easier to just pick up and use, but I often have to calculate amounts of reagents and I have Arnold Moy's Periodic Table (and chemical data) stored in my 50g so I often have to use it.

But unless I have some humongous program (at present I don't), I can still just program the 33s, which is keystroke programming, something I am more used to than RPL, so it is faster for me on the 33s.


I always have my 15c and 16c with me and I use whichever is more suited to my current problem.

I often have my one of my 35s, 42s and 32sii with me and they get used when I feel like a change. Sadly, my 49g+ died a while back.

- Pauli


At work I quite often use my 1991 HP-48SX (the last HP I bought new) for quick calculations.

At home, I rotate amongst my HP-25, HP-41C, HP-33S or HP-48G depending on which one is handy or fun for the task at hand.


It's my company, so most calcs I have are company owned. I have a 27s on my desk and another in the conference room, with several equations "programmed" in the Solver.

Ditto a 17b on my desk with Solver routines for payroll taxes etc.

I use Excel for a lot of things, but usually not for engineering calculations. Those are handled by stand-alone software.


For simple computations, Free42 for Linux, and SCI-15C (too afraid to take my 15C to work) or Free42 or i41CX+ on iPhone. For the rest: Python.
And as little Excel as I can :-)


I tend to use my 35s and 50g at work -- the former for day to day and latter for more complicated things with equations in the solver. Also I use my 17bII+ for all things financial. Occasionally I'll rotate in the old 48G, and pull out the 33s for some tasks as it's easier to haul around (and I'm not so concerned if it goes belly up!). The 20b, while a nice idea, has such a dreadful keyboard that I'm not too fond of it.


my HP41CX at work,

my iPhone with the i41CX+ on the road

Edited: 2 Sept 2009, 8:10 p.m.


Privately owned, our office equip the inhabitants with Sharp scientific calculators. Somehow I find that I have a certain advantage over my peers who uses the office issue calculators, especially on site.

I use primarily a 50g. On the desk it is powered by the usb cable. Data can be transfered back and forth. Use some macro's to export data from AutoCAD. Excel solvers are not very elegant and aften I get stuck. Solvesys goes a long way for my purposes. Excel is a bit troublesome to carry around on construction sites. Contractors have the ability NEVER to follow the drawings and some situations that arise on site just can't be foreseen on the drawing desk, then the 50g with FEM49 comes into it's own right. As a formwork engineer I love my 50g, it is miles better, as far as usability and speed is concerned, than any of the predecessors.

For simple tasks my 42 is also at hand. I feel a bit sorry for the 42s and got a 33s to relieve the 42s from duty. that was a bad mistake. Yes, it is fast, has lots of memory but the keys are horrible once you are used to the 42s. I recently acquired a 32SII but unfortunately I simply find it inferior to the 42s. I will be looking to sell the 32SII soon, or trade it for a new 35.

Edited: 2 Sept 2009, 10:48 p.m.


I do computer and network support. Most of my calculator use at work is four-banger math and occasional hex and binary arithmetic. For that I use my own 32s.

On my PC, I also sometimes use Free42 or Exalibur, both RPN. And for "what-iffing," I will sometimes use Andrzej Wrotniak's "Midget," which is a convenient subset of his superb "Kalkulator." But I really prefer to use the 32s--it gets my hands off the PC keyboard, and it somehow feels more satisfying.

Colleagues have mostly TI 4-bangers, variants of the TI-30, and the occasional Casio. There are a few HPs--a 32s and 21s that the company bought years ago, plus a personally-owned 48gx and 49+.

At home, when I want to play with math, it's mostly with the 32sII. Interestingly, I have no trouble switching between the 32s and the 32sII.


HP-41cx with a dedicated suite of programs, or HP-42S with the same programs but prompting for GMT input or to spice it up with a light show, the HP-67.

Of course I wear the big ugly (as some CALL it) at work. To complete the group I bring the infared printer for hard copy output.

Cheers, Geoff

Edited: 3 Sept 2009, 12:16 a.m.


I just need to do basic electronics engineering calcs, so I prefer a pre-VPAM Casio for the task.

I have a HP 20S in the draw but it doesn't come out much.

And in my dreams, my uWatch Mk2...


Edited: 3 Sept 2009, 2:10 a.m.



At work:

- on my desk: Hp-81

- in meetings: Hp-80 or 22

- at home: Hp-92.

I also have an HP-12C and a very rare Casio BF-100

But these two are just too high-tech for me.




- on my desk: Hp-81

Wow! Is there anyone else in the world that uses one of these on a daily basis? I have one in my collection and like it a lot, but it's s-l-o-w on all financial calculations. IRR for 9 cash flows can take a couple of minutes to solve, good thing it has a huge keystroke buffer that you can load up while it's number crunching.

I have 32sii and a 12C+ for financial calculations on my desk.


Agreed, it is slow!

But given the current length of the investment approval process nowadays in my environment, I have ample time to wait for my Hp-81 to complete simulations without any need to overclock it :-)

...and the printed output is just...gorgeous...let alone the printer noise.




I also have an HP-12C and a very rare Casio BF-100

I recently picked up a Casio BF-80. Is it unusual, too?



The BF-80 (picture below from the Dentaku reference database), is a simpler financial calculator with an interesting double keyboard:

I cannot say if it is unusual too. Having only seen a couple of them in Japan, I wonder if the BF-80 is not dedicated to the japanese market.




I use my 35S at work. Before I had my 48G but it broke, I tried to replace it with a 50G but could never get used to the keyboard layout after the 48G. Ideally I would use my 42S, but don't want to risk it at work.

To me a handheld calculator, with at least the basic set of scientific functions, is essential to do small calculations in a fast and efficient way.


V41 with my own ROM module inserted.

I have included in the ROM module all my User Programs and functions I need for everyday use.


Our company equips the staff with Sharp scientific calculators. Somehow I feel I have a little advantage over my peers who use company issued calculators, since on my desk sits a 42S in "good condition" for quick and dirty RPN calculations, and a 21S if I need some values of statistical distributions. On my notebook, Free42. I have a 50G at home and once used it for evaluating an integral, but it's too large for daily work and too complicated for my little brain.


I have a 50G at home ... too complicated for my little brain.

Walter, now I feel a whole lot better, since that's the way I feel about my 48sx, and based on reading your posts for the last two years (how long I have been a member) I have thought of you as one of the larger brains here. (No offense intended to anyone else!)


Work: HP 50g, HP 12c,

Home: HP 41CX, HP 48G, HP 33S

Shopping: I take along the true shirt pocket sized HP 12C ;-)


I travel for work--a lot. To reduce what I have to carry I use emulators on my MacBook and iPhone. On the iPhone its i41CX+, Free42, SCI-15C. On the Mac its usually 'calc' from the CLI (calc is RPN). Occasionally I use Nonpareil 41CX, Free42, EMU42, EMU41, EMU71, and x49gp (50g ARM emulation).

Before the iPhone I traveled for years with my 48GX, then switched to the replaceable 50g. The 35s was never an option because it cannot be backed-up and has no freely available emulator.


Egan, you seem to be RPLess now (except for your macbook), compared to when you had your 48GX with you. Or did you use the 48GX to emulate RPN machines, and not bother with RPL at all??

The reason I bring this up is because I thought it was worth mentioning there is no RPL on the iPhone yet, at least not that I know of. And while this may suit some here, I personally would not mind such.

And speaking of emulated RPL, anyone know what happened to Robert H., the developer of Power48? Mobilevoodoo dot com is not even his domain anymore.



Egan, you seem to be RPLess now (except for your macbook), compared to when you had your 48GX with you. Or did you use the 48GX to emulate RPN machines, and not bother with RPL at all??

This is true and inconvenient. I had to port all my programs to RPN and it was not easy. E.g. I use MSOLVR2 a lot, now I do not have it. Recreating it in RPN was less than simple and is still not as flexible as MSOLVR2, however, I got through it.
The reason I bring this up is because I thought it was worth mentioning there is no RPL on the iPhone yet, at least not that I know of. And while this may suit some here, I personally would not mind such.

I have everything I need to create a 48GX emulator for the iPhone, except time. I plan to start on this around December.

The HP calculator that I used most productively in my work at the time (nuclear submarine officer) was the HP-67, in 1977-79. (It and accessories cost me more than a month's salary.) Later, I spent a lot of quality time with an HP-41C in civil work.

More than 20 years ago, I settled on regular use of an RPL and an RPN scientific, plus a financial calculator. Subsequently, the RPL machines were HP28C, 28S, 48SX, 48GX, and 49G+. The RPN machines were HP-41C, 41CX, 15C. The financial machine was the HP-12C.

Today, I use the HP50g and HP42S, plus the HP17bii for financial calculations.

The RPN units are (to me) much easier for programming simple problems, compared to the RPL units, hence the two scientifics. Plus, though the HP50g has some financial calc support, what comes built-in doesn't closely match the HP17bii.

My dream machine would be an HP50g that could *also* be programmed in RPN, and that had all the functions of the HP17bii built-in. Then I'd have just one HP in the briefcase.

Edited: 4 Sept 2009, 9:44 a.m. after one or more responses were posted


HP-21. Generally cheap enough to replace, does all my math (only doing 4-function these days), has real keys and LLLLEEEEEDDDDD's.

To me, still the classiest "basic" calc around. With LED's.


Free42 if there's a computer or my PDA handy. 41cv is my favorite, I suppose. Not taking them anywhere, they're about the house.


At office: HP 32Sii
Travelling: HP 35s - if lost its not a loss....
at home: another 32Sii (plus a 25, 28C, 35, 41CV and 45)


At work: HP32sii. Small, relable keyboard. I can do very fast calculations with it ;).

At home, all the others for playing around, most of the time the 50G because I got my first one only a month ago.

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