Although interactive touchscreen technology made its public appearance in 2007 with the introduction of the iPhone from Apple, one of the first mainstream multimedia devices, it was the release of the first tablet-type device (Apple iPad) on April 3, 2010 that so profoundly changed the ecosystem of smart mobile devices. In terms of sales, the first iPad sold more than 300,000 units in its first 24 hours, and almost 15 million units in nine months. For the first time, the general public had access to a high-quality device with a crisper screen, eliminating the ergonomic problems that users encountered with the smaller screens of mobile phones and other devices such as Personal Digital Assistants (PDAs) [1]. The popularity of these devices is due, in part, to the fact that they were soon seen by the general public as an alternative to the 'traditional' graphical user interface (GUI) of desktops or laptops. In addition, compared to other connected devices, tablet-type devices are safe, cheap, easy to use.
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