In what year was your HP lust kindled?


For me, it was in either in 1981 or 1982. I already had had a Sharp PC-1211 and a Radio Shack pocket computer (was it the PC-1?). Anyway, I read an article in french science magazine Science & Vie about which was the fastest pocket computer. The shoot-out was between the HP-67, the HP-41 and I'm pretty sure the above-mentioned Radio Shack (or Sharp equivalent). The method to determine the fastest was a program to calculate something like the first 500 decimals of Pi or thereabouts...

The HP-41 came out on top. I had to get one then and there. I finally got one a year later and I still have it...


I got my first HP (20s) in 1993 to replace my failing TI. But it was just a tool. Later (about 2003), admiring my associates 48GX's, I bought a 38G for the big display. The "lust", as you term it, did not begin until after I found this site, and learned about the many other models available. Maybe 2006.


A Scientific American came with a cardboard punch-out that made a mock HP-35. I played with it 2 days and decided I could use it for my Electronic solutions. With 3 memories and a 4 stack I tried every way I could to get better use of it. In idle time I played with it and discovered a shortcut to a somewhat laborious problem. I bought each new model and sold the old one. RPN was all I knew and I changed the book formulas into keystroke sequences. I was able to simplify all the EE formulas to easy to remember routines. I decry using book formulas and algebraic as backwards and inefficient. Once you change them to suit your use you speed your work and I discovered previously unknown relations that had not been noticed because they did not have the tools for computation I had. Sam 80


I got my first HP, a HP-10C scientific as a student on tight budget in 1979. a few months later I traded-in (to my utter regret now) for an HP-41CX which I still have today.

HP's latest scientific the HP SmartCalc 300S is disappointing. it's not even theirs, it being a generic calculator with HP's badge.


The 10C was introduced in 1982, and the 41CX in 1983. Maybe you were thinking of different models, or a different year?

Edited: 19 July 2009, 9:11 p.m.


It was 1974. I built a Sinclair Scientific from a kit, but it had a faulty clock chip and when finally fixed, I was frustrated by its 3-level stack and lack of an x<>y key. One of the labs at my university had an HP-35 in a security cradle, so I wrote to HP and they sent back some product brochures, including one for the HP-45.

Lust barely begins to describe it.

I worked as a bartender for the Easter holiday break, in order to make enough money to buy an HP-45. I've always had HP calcs since then.


--- Les



For me, my HP-25 in 1977 at university.

The moon landing program snagged my interest!

Cheers, Geoff


For me it was about 1980-81 when I heard about the HP41C & decided to buy one as I was finishing my Engineering Degree. Then moved onto the the 48GX & now the 50G. I still have my original 48GX which is in excellent condition & recently purchased a 41CV & 41CX (both in perfect condition) for old times sake. Also purchased a new 35S earlier this year for my daughter who recently started at Uni.

Must say I still love the feel of the 41 series calculators & enjoy using them for simpler calcs but when I need for flexibility & power out comes the 50G.




For me, it was a refurbished HP-25C in 1977. I easily sold my first calculator then, a TI SR 50 I bought 2 years earlier since HP was way (!) too expensive for me as a student at university. I remember when I first saw an ad of the HP-45 it was priced >1200 DM. I leave it to the experts to calculate this in today's currencies.

There were many internal debates in mid-seventies in physics classes about the "best" scientific calculators one could buy. It was only between TI and HP then, the other brands available were rated "cheap scrap". At that time, build quality and durability of HP's keyboards was exceeding TI's by far. So, yes, it was a kind of "lust" (German) to use one of those, though it was a bare necessity for me.

5 years later I replaced it with a 11C. A 15C or 41C was too expensive, and the 11C had all I really needed -- even L.R.! It was great progress compared to the 25C, so I enjoyed it.

I had to buy a replacement 8 years after this. And I bought an HP again, a 32S (42S was too expensive), but I don't remember a "lust" then. It was a tool, nothing more. I still have it today. My collection started many years later, when I saw an old HP-97 at work.


1972, HP-35 (for about 900 DM. I was the first among my colleagues to get rid of the slide rule), sold it.
Then came a HP-25 (learned to program in a very tight space), sold it.
Then came a HP-67 (a big machine, but no letters), sold it.
Then came a HP-41C (built two memory modules INTO the case), sold it.
Then came a HP-48SX (after many years some keys failed), took it apart.
Then came a HP-50g (very good machine, but lousy manual), still have it.

Greetings, DK2ZA



de N3LPX


1979....from a computer shop in Billings, Mt. called "The Computer Store". They carried HP and Apple products.....When I saw the 41C, I had to own it for $325 approximately (does that sound right?). Learned to program in basic on the 41C and that lead me to buy an HP85 (desktop) and later an HP9816 desktop. Over the years have bought several 41CX's and all of my 41's are in use every day. Don't hold your breath thinking HP will ever produce a product like the 41 and all the other calcs we have come to admire, anymore than GM will produce a vehicle as sexy as the 57 Chevy.



1976 - My playing Lunar Lander on father's HP97 to pass away the time on a transatlantic flight.

Actually this machine kick started my whole interest in computers and programming, and I think I used it more than my father did until I got my own HP33C (which I still have today) in 1978 but I never took to the later models in quite the same way.

Mike T.

PS - I do remember being rather disappointed when I discovered that 'real' computers could only cope with integers 0 - 255.


OK I'm a newbie around here !

2009 - after downloading the excellent I41CX Itouch application.

In May of this year got my hands on my first real HP calculator , 41 CV.

But my interest in calculators was sparked by my maths master at Prep school showing off his non-HP one in 1974.



I was always aware of HPs and very curious about them but they were always far too expensive for me to consider. I survived with loaned Casios and bought a Tandy/Sharp PC1 and later another Sharp programmable which was horrible. Eventually, I got so fed up with the Sharp and as I was in work and earning money, I went up to town to do some research with the intention of coming back with the best calc I could get.

That turned out to be a 48SX which was an amazing eye-opener!

I didn't get into collecting until a little later but still before the internet became readily available so HPCC got me my first additions. Then I went completely off it all for many years until something triggered the interest again. Still seeking the holy grail, a 9100B...



Around 1978. I'd become fascinated with programmable calculators after seeing a TI 52(?) owned by a friend of my parents. My brother got an HP 25C and around 1978, I convinced my father to buy me a 29C. I tried to get him to spring for the 19C, which had a built-in printer but I couldn't justify it.

A couple of years later a got a 41C, then memory modules, card reader, math module printer... I replaced the 41C with a 421CV in college in 1982 I believe. That was my main calculator until 2 years ago when my daughter needed a TI 83 and I started to wonder what had happened in the world of HP calculators in the intervening 25 years. Bought a 50G and learned to program it. I'm still learning the functions in this nifty little machine and I've been writing code in system RPL and C/C++ for it.

Got a side gig writing software for a 48gii, which is a nice less-expensive alternative to the 50g.


1988 when I got a 28C. It only had 2k RAM, so I was soon tempted by a Casio fx-850P because it had more RAM.

I soon found that I wasted most of it reprogramming calculator functions! I got to hate the Casio. On the 28 everything was integrated and just about all keyboard functions were available for programming. RPL was just more efficent and flowed so much easier.

I trashed the Casio (it ended up under the wheel of my car) and got a 28S. I still use it to this day. Unfortunately the battery door is broken. Since then it's been only HP's for me. Although stuck on RPN, I find the 20S quite an amazing little unit.

I do not have a "lust" in the collector sense, I just can't imagine using any other calculator.



My elder brother introduced me to his HP-41. I thought this so called reverse polish notation was a bit confusing, but I could spot out some nice things about it too. Still I had my beloved Casio PB-100 and my Sinclair ZX-81, both basic programmable so they were perfect mates. But later on I got an HP-42S as a present from my brother. That was how it all started. I bought an HP-48SX in 1992 and sold the HP-42S to a classmate (most regretfully).
Today I have more than 40 different HP's...

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