The terms microprocessor and central processing unit (CPU) are now used interchangeably. However, CPUs predate microprocessors. For example, the IBM System/360 (1964) had a CPU made from circuit boards containing discrete components on ceramic substrates. The Intel 4004 (1971) was a 4-bit microprocessor designed to run the Busicom calculator. Five months after its release, Intel released the Intel 8008, an 8-bit microprocessor. Its purpose was to store patient medical records. The computer supported a disk operating system to run a Memorex, 3-megabyte, hard disk drive. It had a color display and keyboard that was packaged in a single console. The disk operating system was programmed using IBM's Basic Assembly Language (BAL). The medical records application was programmed using a BASIC interpreter. However, the computer was an evolutionary dead-end because it was extremely expensive. Also, it was built at a public university lab for a specific purpose. Nonetheless, the project contributed to the development of the Intel 8080 (1974) instruction set. IBM embraced the Intel 8088 when they entered the personal computer market (1981). As consumer demand for personal computers increased, so did Intel's microprocessor development.
On earlier iPhones with home button, screenshots can be created with the simultaneous press of the home and power buttons. In comparison to Android OS, which requires the buttons to be held down, a short press does suffice on iOS. On the more recent iPhones which lack a physical home button, screenshots are captured using the volume-up and power buttons instead. The camera application used a skeuomorphic closing camera shutter animation prior to iOS 7. Since then, it uses a simple short blackout effect. Some camera settings such as video resolution and frame rate are not adjustable through the camera interface itself, but are outsourced to the system settings. A new feature in iOS 13 called "context menus" shows related actions when you touch and hold an item. When the context menu is displayed, the background is blurred. To choose from a few options, a selection control is used. Selectors can appear anchored at the bottom or in line with the content (called date selectors).
A reliable, but somewhat more complicated procedure for addressing software issues is known as a system restore (also referred to as imaging, and/or reimaging), in which the computer's original installation image (including operating system and original applications) is reapplied to a formatted hard drive. Anything unique such as settings or personal files will be destroyed if not backed up on external media, as this reverts everything back to its original unused state. The computer technician can only reimage if there is an image of the hard drive for that computer either in a separate partition or stored elsewhere. On a Microsoft Windows system, if there is a restore point that was saved (normally saved on the hard drive of the computer) then the installed applications and Windows Registry can be restored to that point. This procedure may solve problems that have arisen after the time the restore point was created.
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