How much do you really know about smartphone tech past and present? Few technologies today inspire as much excitement as mobile devices, but keeping up with the never-ending stream of new products can be tough for even the most die-hard gadget hound. Think you know your handsets, chips, and mobile OSes? Try our 20-question mobility IQ quiz and find out how tapped in you really are!1. Which of the following companies was first to market with a device that could be termed a smartphone?a. Palm b. Nokia c. Research in Motion d. IBM Take the InfoWorld mobile tech IQ test Technology IndustrySmall and Medium Business