OS 7.03, released Oct 23, 2013, mostly disabled the gyroscopic compass on the Apple iPod Touch, including new-at-the-time models. Later software updates further restricted compass-related hardware features, to only devices with GPS/cellular connectivity. A "soft update" over iTunes, of Sep 9, 2014, increased the size of every user's iTunes by U2's Songs of Innocence album, which at the time could not be deleted from many users' libraries. OS 8, which launched Sep 12, 2014, while not as radical an aesthetic change as iOS 7 from iOS 6, being virtually required for many users. ↑ "iOS 8.1". Apple. ↑ "About Apple TV (2nd and 3rd generation) software updates". ↑ "Apple - iPad Air - View the technical specifications for iPad Air". ↑ "Apple - iPad mini - View the technical specifications for iPad mini". ↑ "Apple - iPhone 5c - Technical Specifications". ↑ "Apple - iPhone 5s - Technical Specifications". ↑ Beal, Vangie (22 August 2011). "What is Apple iOS? Webopedia Definition". ↑ Honan, Matthew (January 9, 2007). "Apple unveils iPhone". ↑ "Apple announces iOS 8 at WWDC with continuity features, Messages enhancements, Quicktype keyboard, more". ↑ "Apple Updates iOS to 6.1". Apple Newsroom.
Aesthetically similar to its predecessor, iOS 11, it focuses more on performance than on new features, quality improvements and security updates. It was succeeded for the iPhone and iPod Touch by iOS 13 on September 19, 2019 and for the iPad by iPadOS 13 on September 24, 2019. Security updates for iOS 12 continued for four years following the release of iOS 13 for devices unable to run the newer operating system. Fixes bug that allowed maliciously crafted font to gain arbitrary code execution. Performance optimizations were made in order to speed up common tasks across all supported iOS devices. Screen Time is a new feature in iOS 12 that records the amount of time a user spent on the device. Screen Time also provides blocking features to limit usage of apps (with time limits) or set other restrictions such as on purchases or explicit content. It replaces Restrictions in the iOS Settings app, but can also be used by adults to limit their own usage.
A computer is a machine that can be programmed to manipulate symbols. It responds to a specific set of instructions in a well-defined manner. It can execute a prerecorded list of instructions (a program). It can quickly store and retrieve large amounts of data. Therefore computers can perform complex and repetitive procedures quickly, precisely and reliably. Modern computers are electronic and digital. The actual machinery (wires, transistors, and circuits) is called hardware; the instructions and data are called software. Central processing unit (CPU): The heart of the computer, this is the component that actually executes instructions organized in programs ("software") which tell the computer what to do. Memory (fast, expensive, short-term memory): Enables a computer to store, at least temporarily, data, programs, and intermediate results. Mass storage device (slower, cheaper, long-term memory): Allows a computer to permanently retain large amounts of data and programs between jobs. Common mass storage devices include disk drives and tape drives.
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