Postifix
('RPN') .vs. Infix ('algebraic;) :-)
Manifest in the 70's as HP vs TI.
Over here, TI calcualtros were not particularly common. The common brand
was (and is, I guess) Casio.
Of course those of us who prefer RPN bought HPs.
-tony [Mind you, when i saw a pristine TI59 with magnetic cards, stnadard
library module and hard and soft cases i na charity shop, I grabbed it...]