It's a scary world out there. During a recent Google search for "HP-35" I ran across the following gems. This esteemed group needs no help figuring these out, but comment I must.
*** Paraphrased: "I bought my HP-35 when it first came out in 1972 for $150." [Must have been stolen.]
*** Paraphrased: "The HP-35 was the world's first programmable calculator. I spent countless hours programming my HP-35." [Mine must be defective.]
*** A direct quote from Mathpad.com: "Calculators that use Direct Algebraic Logic are favored by most scientists and engineers over the more common Reverse Polish Notation type of calculator." [(1) At least the smart scientists and engineers still favor RPN. (2) Did HP really produce enough HP-41s, HP-32SIIs, and HP48s to overtake all the $1.98 algebraic logic masterpieces at the grocery store?]
Fred