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In today's installment of our regular Back in the Past series, we'll focus on the history of Apple. Specifically, we will go back to 2010 - that's when Apple introduced and released its iOS 4 operating system. This innovation was revolutionary in several different ways, and we will remember its arrival today.

On June 21, 2010, Apple released its new operating system, which was called iOS 4. With the arrival of this operating system, users received interesting and useful news. iOS 4 was a fairly significant step forward for Apple and for the users themselves. In addition to being the first version of Apple's mobile operating system that was not named "iPhoneOS", it was also the first version that was also available for the then-new iPad.

Steve Jobs presented iOS 4 at WWDC together with the iPhone 4. The novelty brought, for example, a spell check function, compatibility with Bluetooth keyboards or the ability to set the background for the desktop. But one of the most fundamental changes was the multitasking function. Users could now use a selected application while other applications were running in the background – for example, it was possible to listen to music while browsing the Internet in the Safari web browser environment. Folders were added to the desktop to which users could add individual applications, while native Posta gained the ability to manage multiple e-mail accounts at once. In the Camera, the ability to focus by tapping on the display has been added. Data from Wikipedia also started appearing in the results of the universal search, and geolocation data was also added to the photos taken. Users also saw the arrival of FaceTime, Game Center and the iBooks virtual bookstore with the arrival of iOS 4.

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