HP calculators

That depends on what you mean by 'collect' :-) I personalyl don't consider myself to be a 'collector' because I don;'t try to obtain all the slightly differnet versions of each model (which may just be consmetic changes). However, I do love such machines, both handheld and (more particualrly) desktop. I certainly don't have them all, but I have a reasonalbe trange of handehlds form the HP35 to the HP49 (I don't haev many woodstock models, I dno't have either sting model, but I do have a good ssrotment of HP41 stuff (incluing a home-made 'test calcualtor' and HP71 stuff.) For the desktps I have many of them. Starting with the 9100B, then the 9810, 20 nand 30, 9815, 9825, etc. Yes, I repair them. I produce the docuemtnation to repair them. And I give talks on them at HPCC. -tony