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A Brief History Of Touchscreen Technology: From The IPhone To ... - Forbes
Smartphone - Wikipedia
Smartphone history - The first smartphone - SimpleTexting
Who Invented Smartphone? Unraveling the History of Mobile …
IBM created the world's first smartphone 25 years ago
When Was the First Smartphone Invented? - How-To Geek
Which Was the First Touchscreen Smartphone [Fact Checked]
From touch displays to the Surface: A brief history of touchscreen ...
The Brief History of Smartphones - ThoughtCo
Timeline: A History Of Touch-Screen Technology - NPR