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HP-19C (inside the dot) - Printable Version

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HP-19C (inside the dot) - Vassilis Prevelakis - 06-16-2005

The secret hiding in the decimal dot of the HP-19C has been revealed.



Re: HP-19C (inside the dot) - Dave Shaffer (Arizona) - 06-16-2005

Somebody (Katie?) showed us this several years ago, too.

Re: HP-19C (inside the dot) - GWB - 06-16-2005

Thanks for sharing this with us. It makes me remember of this digital graffiti I first saw some years ago in Newsweek magazine:


The HP-19C decimal point is kind of an Easter egg rather than graffiti, I think. Does it happen on HP-29C too?



Re: HP-19C (inside the dot) - Vassilis Prevelakis - 06-17-2005

Dave Shaffer wrote:
> Somebody (Katie?) showed us this several years ago, too.

Yes it was Katie. That was before I got my HP-19C; I had asked on the list if anybody had pictures of the hp logo on the dot and Katie posted them.

They were a bit fuzzy as I recall.

I hope to get better pictures as I get more familiar with my camera.


Re: HP-19C (inside the dot) - Vassilis Prevelakis - 06-17-2005

a) as the link states, the "bill sux" on the Pentium die was a hoax, so it does not count.

b) the hp logo on the dot is an attribute of the display, so its not observed on the HP-29C.

I wonder though, whether you can see the HP logo on the decimal dot on the HP-10C which shares the same case design as the HP-19C.

Re: HP-19C (inside the dot) - Katie - 06-17-2005

Yes, the HP-10 (not 10C) uses the same display as the 19C and has the 'hp' dot as well.

Interestingly, I had (but sold) a 19C that didn't have the 'hp' dot. Apparently, they made at least two different displays for these calculators. I've only seen (up close) 2 HP-10's and 4 HP-19C's and have only come across the non-'hp' dot on one machine, so I really don't have any idea of how prevalent the non-'hp' dot displays are.

I'm not sure what happened to my fuzzy 'hp' dot pictures, I do remember that it was very hard to photograph with my cheapo digital camera.

Edited: 17 June 2005, 1:55 a.m.

Surprise! - Mark Lynch - 06-17-2005

Thank you so much! I have a few 19Cs and *never* noticed this. What a good piece of trivia. How is it Dave Hicks doesn't mention this in his write up?

Re: Surprise! - Thomas Okken - 06-17-2005

That HP logo is so small it's rather easy to overlook! I'm not surprised that many HP-19C owners are not aware of it.

I used to own an HP-19C, and one time I got a powerful magnifying glass, and started looking at all sorts of things through it. The 19C being my (other) favorite toy, it was only a matter of time before I took a close look at its display, and lo!, there it was.

This was also mentioned in some HP Key Notes issue, IIRC, but don't ask me which one -- by another individual playing with a magnifying glass...

- Thomas

Re: HP-19C (inside the dot) - GWB - 06-17-2005

You are right, hoaxes shoudn't count. These 'single-atom'-matrix IBM letters are also impressive:


(Sorry to have gone off-topic)

(1234 to remove)

Re: Surprise! - Vassilis Prevelakis - 06-17-2005

Mark Lynch wrote:
> I have a few 19Cs and *never* noticed this.

Remember I was using my original HP-19C at school, my vision then was much much better [1] and since I was using that machine all the time, I had more opportunities to notice the HP logo.

[1] Last year, when I received my used HP-19C I eagerly looked at the display to see the HP logo, but I couldn't see it! I had to use a magnifying glass. If I didn't know it was there I wouldn't have found it.


Re: Is this real? - Ronald - 06-18-2005

I checked both my HP10 and 19, but neither one has the "hp" logo.


Re: Is this real? - Mark Lynch - 06-20-2005

I definitely see it on one of my 19Cs, haven't checked the other. Someone else in this thread said there were some manufactured with, and others without.

I will say this: It is *extremely* tiny (yet crisp), you will need a magnifying glass to see it for sure.