Making its debut at the New York World's Fair in 1964, the AT&T Picturephone enabled the first transcontinental video call between that venue and Disneyland. The Mod 1 was the first Picturephone on display, which packed a Plumbicon camera and a small CRT display within its oval housing. Similar to today's laptop webcams, the Picturephone's camera was located atop the screen in order to help users see eye to eye. Six years later, AT&T rolled out Picturephones commercially in Pittsburgh, but the units proved to be too bulky and pricey. It wouldn't be until much later, with the advent of services like Skype (for the desktop) and FaceTime (for the iPhone and iPad) that video calling would go mainstream.
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