New in collection: HP-85a

Yes, the old HP machiens are very well designed, well made mechanically, and generally work well even after many years. MY HP9800 series machines are gettign on for 40 years old, and I've only had to replace 1 or 2 ICs in each of them and do the obvious mechancial repairs (rubber rollers, etc). And the hP67 is a true classic calculator [1]. I still use mine a lot. [1] The 'classic series' HP handheld calcualtors are things like the HP35, 45, 55, 65, 70, 80. The HP67 is in a simialr case to these and some claim it's a memebr of that family. But to me it's not. I judge a machine by what's inside. To me the 'classic series' are those usign thr 'Arithmetic and Registers' and 'Control and Timing' ICs for the processor, thr HP67 on the other hand uses an ACT (Arithmetic, Control and Timing) single-chip CPU, and thus I class the Hp67 in the Woodstock family along with the HP21, etc. -tony