Any HP-35 RPN calculator fans out there? Here is a free, working version (online)!

[DemoTex]

I had a HP-35 and a HP-55 back in the 1970s. I loved the Reverse Polish Notation (RPN). Here is an online, working version of the HP-35. I ran through some basic trig and log/ln functions and it seems to work fire. Free too (sold for $395 in 1972)!

http://www.clearskyinstitute.com/hp-35/calc.html


1972 advertisement for HP-35

[GodlessBiker]

1. $395?!?!? That was real money back then.

[MannyGoldstein]

2. WTF? Where's The Equals Key?

Relax, that was a joke.

Actually, I'm probably the only engineer in recorded history who prefers =, (, and ) over RPN - but that link is a blast, complete with authentic-looking 7-segment LEDs.

Thanks!

[jody]

3. My HP-35's circuit board has gold conductive pathways. I keep it for sentimental reasons. n/t

[madrchsod]

4. i`ve seen a lot of these types of 80`s calculators at my local charity shop

most of them are a dollar and they test all the electornics they sell. maybe i`ll start collecting them.

[MineralMan]

10. A good HP-35 does pretty well on ebay. FWIW.

[lapfog_1]

5. Wait till you get a bid of 07734

of course, you have to hold the calculator upside down.

[MineralMan]

11. Ha! Yes.

Actually, there really are calculator collectors out there. I have a cool one with nixie tubes sitting on my desk. I use it regularly. I love nixie tubes.

[slutticus]

6. I used to HATE RPN......until I actually started using it.

Absolutely powerful (and beats using parentheses and brackets in long calculations....)

[antipode]

7. I still have (hopefully) a Wang "computer" (programmable calculator) from

around 1794 that used RPN...if it's still in my mom's attic and maybe even the modified Selectric typewriter that was offered as a printer. I need to see if it's still there.

[gothmoor mythergos]

9. Wow, did it belong to Ben Franklin?

[antipode]

14. I think it might have been far older...I heard that Adam had one and Eve had an apple.

:D

[MineralMan]

13. Gosh! My wang isn't nearly as old, but it still works.

[Sancho]

8. I bought one of these for freshman chemistry and physics! At $395!

1972...A1 in the draft...those were the days! Thanks for the post.

[EnviroBat]

12. How the hell do you make it add two numbers?

Fikkin goofy-ass calculator. No wonder only engineers used them...

[antipode]

15. 2 {enter} 4 +

gives 6
:D

[EnviroBat]

20. Yeah, I had to keep mashin keys until I figured it out...

[gravity]

16. I use the HP-12C

RPN rocks

[screembloodymurder]

17. HP 32S II

Still use it.

[Owl]

18. I whomped your puny HP35 with my HP21!!!

Bwwhahhhhhhh!

[Fovea]

19. ? forth love

n/t