I admit that I have a weakness for calculators - both new and vintage. My nerd gene is pretty dominant, so I'm putting it down to that. They'll have a cure one day I'm sure, but until then I can't wait for my new HP41CV to arrive. I landed it
horribly cheaply...
HP calculators are usually going for a fortune on eBay these days.
A couple of my favourites in my collection, some from from way-back:
Hewlett Packard HP41CV
Hewlett Packard 35S
Hewlett Packard 32E
Hewlett Packard 33E - thanks Bert!
Hewlett Packard 33C (first with continuous memory) - thanks Bert!
Hewlett Packard 12C
Elektronika MK-61 (Russian RPN calculator from the mid-80's)
I've always loved HP's tactile keyboards and RPN logic rather than algebraic. The Russian MK-61 is really interesting too - and being heavily influenced by HP, the Russians made a fine calculator that's ultimately hackable. They didn't provide any safety features in the design, so you can access a pile of undocumented functions. I really like the green vacuum fluorescent display too.
Hmmmm... HP35 - the original hand-held scientific calculator.... I want one.... and a HP67CX... and a....
I have a dozen other "lesser" algebraic calclators floating around, like a couple of T.I.'s etc, (them's fightin' words to a T.I. owner - LOL!) but they don't hold the fascination for me for some reason. I wouldn't mind a Casio FX-702P programmable though - just because I had one years ago and loved it.