On Jan 7, 2014, at 5:27 PM, Peter Corlett <abuse at cabal.org.uk> wrote:
  On Tue, Jan 07, 2014 at 07:50:10PM -0500, Paul Koning
wrote:
 [...]
  Or they might be people like me ? I?ve been a
professional programmer for 40
 years and I?m most likely to type ?python? when I need to do some quick
 calculation. But I also keep a slide rule in my office. (Also an abacus ? but
 unfortunately that one is still only decoration, I have not yet learned how
 to use it.) 
 The Python REPL is also my usual calculator.
 I used to own a slide rule as a gag item to keep on my desk, but it went
 walkies in the late 1990s. It, like a RPN calculator, is a tool of a bygone era
 in that while I have no difficulty understanding the theory of operation and
 could figure out how to use them from first principles, I'd rather not actually
 do so when there are easier and more accurate tools around.
  
Since we're on this topic...my usual calculator is Macsyma (yes, the giant
LISP
program that can do symbolic computation).  I mainly use it for a few reasons:
   1) it does "infinite" precision math, so I don't *ever* worry about long
computations
       having errors due to intermediate rounding
   2) I can get it to present results as the ratio of two integers (sometimes very big
       integers) which is useful for a lot of what I do at times
   3) it does symbolic computation
   4) it's written in LISP (sorry had to add that one).  ;-)
TTFN - Guy