[tallhappy]

Yes.

Reverse Polish Notation -- the greatest.

[Cuttnhorse]

Reverse Polish Notation -- the greatest.

LOL! The young engineers I work with have fits trying to use my HP...which is sitting on my desk this minute.

What I find amazing is I bought mine in 1982, (the store where I bought it is long gone) and I think I've only changed batteries 3 or 4-times and I use the darn thing every day. Mine has been all over the world.

[LibWhacker]

RPN ruined me; I can't use a regular calculator. I can add two numbers, but give me a long expression to evaluate, and I'm lost, lol!

[skinkinthegrass]

Reverse Polish Notation -- the greatest.

I agree...can't use TI (uses A.O.S. - alg. op. sys.) H-P s' are the Best...to bad they aren't as widespread today...cheaper, less capable calculators Dominate the market. I've got a H-P 49G (and 48GX).

[r9etb]

Reverse Polish Notation -- the greatest.

Gotta agree.

I still use my HP-41CX, which I went out and bought immediately after using a "regular" calculator to crunch numbers from a wind tunnel lab. It cost $300 in 1983, and I've never once regretted the expense.