"John Larkin" wrote in message
...
Given target resistance T and starting resistance S, what value P do
we need to put in parallel with S to get T? To 4 places?

HP-35S:

T
P
+/-
XEQ P (the parallel resistance program :-) )
ENTER

---Joel
(Who won the HP-35S programming contest at the HHC 2007 conference
recently...)