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  2. Maddox rod - Wikipedia

    en.wikipedia.org/wiki/Maddox_rod

    The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...

  3. Preview (macOS) - Wikipedia

    en.wikipedia.org/wiki/Preview_(macOS)

    v. t. e. Preview is the built-in image viewer and PDF viewer of the macOS operating system. In addition to viewing and printing digital images and Portable Document Format (PDF) files, it can also edit these media types. It employs the Aqua graphical user interface, the Quartz graphics layer, and the ImageIO and Core Image frameworks.

  4. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

  5. TinkerTool - Wikipedia

    en.wikipedia.org/wiki/TinkerTool

    OS X 10.10 Yosemite: TinkerTool 5, v5.7; OS X 10.11 El Capitan: TinkerTool 5, v5.7; macOS 10.12 Sierra: TinkerTool 6, v6.5; macOS 10.13 High Sierra: TinkerTool 6, v6.5; macOS 10.14 Mojave: TinkerTool, v7.4.2; macOS 10.15 Catalina: TinkerTool, v7.4.2; macOS 11.1 Big Sur: TinkerTool, v8.0.0; macOS 12 Monterey: TinkerTool, v8.0.0; macOS 13 Ventura ...

  6. Horror fusionis - Wikipedia

    en.wikipedia.org/wiki/Horror_fusionis

    Ophthalmology. In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia. Even when the double vision images ...

  7. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    An operating system ( OS) is system software that manages computer hardware and software resources, and provides common services for computer programs . Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, peripherals, and ...

  8. macOS version history - Wikipedia

    en.wikipedia.org/wiki/MacOS_version_history

    macOS. The history of macOS, Apple 's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project to replace its "classic" Mac OS. That system, up to and including its final release Mac OS 9, was a direct descendant of the operating system Apple had used in its Mac computers since ...

  9. Sherlock (software) - Wikipedia

    en.wikipedia.org/wiki/Sherlock_(software)

    Sherlock, named after fictional detective Sherlock Holmes, was a file and web search tool created by Apple Inc. for the PowerPC -based "classic" Mac OS, introduced in 1998 with Mac OS 8.5 as an extension of the Mac OS Finder 's file searching capabilities. Like its predecessor (System 7.5’s revamped 'Find File' app, adapted by Bill Monk from ...

  10. Macintosh File System - Wikipedia

    en.wikipedia.org/wiki/Macintosh_File_System

    Mac OS 7.6.1 (read-only) Macintosh File System ( MFS) is a volume format (or disk file system) created by Apple Computer for storing files on 400K floppy disks. MFS was introduced with the original Apple Macintosh computer in January 1984. MFS is notable both for introducing resource forks to allow storage of structured data, and for storing ...

  11. Architecture of macOS - Wikipedia

    en.wikipedia.org/wiki/Architecture_of_macOS

    The architecture of macOS describes the layers of the operating system that is the culmination of Apple Inc. 's decade-long research and development process to replace the classic Mac OS . After the failures of their previous attempts—Pink, which started as an Apple project but evolved into a joint venture with IBM called Taligent, and ...