I detest the HP 35s. They've taken something like rectangular to polar conversions, which used to be a simple one keystroke operation, and made it a complicated and convoluted mess involving complex numbers. Even the HP 33s didn't do this. And the HP 35s can't do matrix math, something even the ancient HP 15c could do. But this is all moot, since the HP 35s is still in production, and therefore protected from copying.

## May 2021 Speculations

### Re: May 2021 Speculations

DM15L, S/N 00548. DM42, SN: 00159. DM41X, SN: 00973.

### Re: May 2021 Speculations

[HP 35S] Yeah, I bought one of those a few years back. I thought, neat, a modern-ish HP RPN calculator! Boy, was I wrong. It looks appealing to classic HP users because of its design and, you know, RPN. But it is utterly cheaply made, which includes the buggy-as-hell (and non-updatable) firmware. It was a thorough disappointment, and I sold it after a week or two.

DM41X #542, DM42 #650, DM41L #801, HP 41CX, HP 41CV, HP 50G, HP11C, TI 89

### Re: May 2021 Speculations

Both are harsh reviews from my point-of-view. Gets the daily number crunching done. It is allowed on all of the professional test exams I have to maintain and is RPN. Each to their own.

HP48GX since 1994

DM42 (4), HP42s, DM41X, HP35s (a lot)

DM42 (4), HP42s, DM41X, HP35s (a lot)

### Re: May 2021 Speculations

Sure, it gets the job done, but there are many much better choices. For example, the HP 32SII is basically the same calculator as the HP 35s, but much better quality, better designed and a lot less buggy. I still use mine that was provided to me at my job, and that they graciously let me keep when I retired.

Just out of curiosity, are calculators with matrix math not allowed on professional test exams where you live ? When I took my PE, we were required to use a slide rule.

DM15L, S/N 00548. DM42, SN: 00159. DM41X, SN: 00973.

### Re: May 2021 Speculations

Unsure how calculators are determined to be fit or unfit for exams. I am a 48GX user but that calculator was not allowed on any exams after leaving college. FE, PE, etc. no go.

My 48 calcs are dying more frequently and the 35s is in production and a nice pocket calculator. I have the DM42 for a few programs I need once a week or so.

Ive never found the 35s to be buggie.

My 48 calcs are dying more frequently and the 35s is in production and a nice pocket calculator. I have the DM42 for a few programs I need once a week or so.

Ive never found the 35s to be buggie.

HP48GX since 1994

DM42 (4), HP42s, DM41X, HP35s (a lot)

DM42 (4), HP42s, DM41X, HP35s (a lot)

### Re: May 2021 Speculations

DM15L, S/N 00548. DM42, SN: 00159. DM41X, SN: 00973.

### Re: May 2021 Speculations

Ha, HPMike beat me to it; I was going to post the same link.

Especially #9 drove me nuts, although admittedly other bugs can potentially have much worse consequences.

I don't want to spoil your fun if you like the device, though. I just didn't like it, and I'm happy as never before with my 41X now.

Especially #9 drove me nuts, although admittedly other bugs can potentially have much worse consequences.

I don't want to spoil your fun if you like the device, though. I just didn't like it, and I'm happy as never before with my 41X now.

DM41X #542, DM42 #650, DM41L #801, HP 41CX, HP 41CV, HP 50G, HP11C, TI 89

### Re: May 2021 Speculations

Don't want to cut down the merits of the 15C but 'no menus' isn't true. IMO it has two menus: TEST & MATRIX. And it features the outdated keycode programming paradigm. And complex numbers and matrices on a 10-digit 7-segment display...HPMike wrote: ↑Fri Jun 04, 2021 4:04 pm... It could be the HP 25C, but not the HP 45, because the latter is not keystroke programmable. Frankly, I don't see why anyone would want to go backwards from the magnificent HP 15C (DM15L), which is keystroke programmable with no menus, and offers complex math, matrix math, root solver, integration, linear regression, coordinate conversion, statistics, hyperbolic functions, etc. ...

I concur with Eddie: For the essential calculations, something on the lines of the 25C or 29C would do. Add L.R. and most people will be happy. And readable program steps (NO keycodes) would be the cream on the coffee.

DM42 SN: 00041 β

HP-35, HP-45, ..., HP-35S, WP 34S, WP 31S, DM16L

**WP 43S running**on this deviceHP-35, HP-45, ..., HP-35S, WP 34S, WP 31S, DM16L

### Re: May 2021 Speculations

Yes, technically TEST and MATRIX are menus, but the values are conveniently listed on the back of the calculator, so it's not like you have to be fumbling throughout the manual to find them. Also, they are only used during programming, so all operations used during normal manual use can be accessed without using any menus.Walter wrote: ↑Fri Jun 04, 2021 9:22 pmDon't want to cut down the merits of the 15C but 'no menus' isn't true. IMO it has two menus: TEST & MATRIX. And it features the outdated keycode programming paradigm. And complex numbers and matrices on a 10-digit 7-segment display...HPMike wrote: ↑Fri Jun 04, 2021 4:04 pm... It could be the HP 25C, but not the HP 45, because the latter is not keystroke programmable. Frankly, I don't see why anyone would want to go backwards from the magnificent HP 15C (DM15L), which is keystroke programmable with no menus, and offers complex math, matrix math, root solver, integration, linear regression, coordinate conversion, statistics, hyperbolic functions, etc. ...

I concur with Eddie: For the essential calculations, something on the lines of the 25C or 29C would do. Add L.R. and most people will be happy. And readable program steps (NO keycodes) would be the cream on the coffee.

So, you'd be happy not having hyperbolic functions, because the HP 25c and HP 29c lack hyperbolic functions. How about a root solver ? At the very least, I'd want the capabilities of a HP 34C, except it does not have hyperbolic functions, which brings us back to the HP 15C ! Matrix operations may not matter to you, but they are essential to me, and the sad fact is that you have to go all the way up to the HP 42s to find them beyond the HP 15c.

DM15L, S/N 00548. DM42, SN: 00159. DM41X, SN: 00973.

### Re: May 2021 Speculations

Duplicate post

Last edited by HPMike on Sun Jun 06, 2021 9:51 pm, edited 1 time in total.

DM15L, S/N 00548. DM42, SN: 00159. DM41X, SN: 00973.