It's hard to say what the primary function of any piece of technology is
anymore - is the PDA my notepad, my word processor, my calculator, my email
portal, my calendar, or my telephone? Somebody will surely note in the
history books that once there were cell phones, that cell phones were not to
be used in flight, and that soon this simple prohibition couldn't really be
enforced because cell phones came up with an airplane mode to allow for the
use of all there other functions.
