> > If so, does'nt this mean the calculator leaves precedence > decisions to you? > Yes it does and hence my concern. Dwayne was getting the correct answer with: 6 [Enter] 2 [Enter] 1 [Enter] 2 [Enter] [plus] [multiply] [divide]. I am getting it with: 6 [Enter] 2 [Enter] 1 [Enter] 2 [plus] [multiply] [divide]. So there seams to be a difference in RPN implementation. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .