Really? Since when?

Most authoritative sources disagree about the definition of the word "smartphone," although nearly all say that it's a phone with PDA and Internet functionality, and say nothing about the "openness" of the OS.

Gartner defines "smartphone" as "A large-screen, voice-centric handheld device designed to offer complete phone functions while simultaneously functioning as a personal digital assistant (PDA)."

Palm Inc.'s definition is: "A portable device that combines a wireless phone, e-mail and Web access and an organizer into a single, integrated piece of hardware."

I searched a wide range of sources, including all major American technology publishing houses, gadget-book publishers, online dictionaries, encyclopedias, the Wikipedia and others, and not one of them agrees with ABI's requirement that a smartphone by definition runs an open OS that supports third-party software development.