IBM Simon (1993)
IBM's Simon predates the term "smartphone" (it was coined by Ericsson's GS88 prototype), but it's widely considered the first true smartphone. And Big Blue's mobile device was BIG -- the comically (by today's standards) large mobile phone-PDA combination stretched 8 inches long and featured a 4.5-inch black-and-white touchscreen display (yes, a touchscreen!). Additionally, the device ran familiar applications: email, calendar, address book, calculator, note pad and a stylus input for handwritten notes. The Simon was first introduced at 1992's Comdex, but with a whopping price tag of $899 and a target audience that hadn't fully embraced the laptop computer, IBM's smartphone failed to take off. But it certainly set the stage for future innovation.
Dimensions: 8 inches by 2.5 inches by 1.5 inches thick