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.DS Store
In the Apple macOS operating system, .DS_Store is a file that stores custom attributes of its containing folder, such as folder view options, icon positions, and other visual information. The name is an abbreviation of ''Desktop Services Store'', reflecting its purpose. It is created and maintained by the Finder application in every folder, and has functions similar to the file desktop.ini in Microsoft Windows. Starting with a period character, it is hidden in Finder and many Unix utilities. Its internal structure is proprietary, but has since been reverse-engineered. Starting at macOS 10.12 16A238m, Finder will not display files (even with set). Purpose and location The file .DS_Store is created in any directory (folder) accessed by the Finder application, even on remote file systems mounted from servers that share files (for example, via Server Message Block (SMB) protocol or the Apple Filing Protocol (AFP)). Remote file systems, however, could be excluded by operating ...
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DS Automobiles
DS Automobiles is a French luxury vehicle marque which was introduced in 2009. Formerly part of Citroën, DS has been a standalone brand since 2015 (2012 in China). DS can be an abbreviation of Different Spirit or Distinctive Series, although it is also considered a nod to the classic executive car Citroën DS. The name is also a play on words, as in French it is pronounced like the word ', meaning "goddess". History The PSA Group originally consisted of three automobile brands, Peugeot, Citroën and the soon dropped Talbot, but none was considered a "premium" brand. Since 1976, PSA has experimented with differentiating the brands by price level, similar to Chevrolet/Buick or Volkswagen/Audi, but neither brand had the strength to justify premium pricing. By launching the DS line, Groupe PSA decided to build on the design heritage of the original Citroën DS (1955–1975) designed by Flaminio Bertoni and André Lefèbvre. The DS line started with the Citroën DS3 in the be ...
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Windows Thumbnail Cache
On Microsoft Windows operating systems, starting with the Internet Explorer 4 Active Desktop Update for Windows 95 to 98, a thumbnail cache is used to store thumbnail images for Windows Explorer's thumbnail view. This speeds up the display of images as these smaller images do not need to be recalculated every time the user views the folder. Purpose Windows stores thumbnails of graphics files, and certain document and movie files, in the Thumbnail Cache file, including the following formats: JPEG, BMP, GIF, PNG, TIFF, AVI, PDF, PPTX, DOCX, HTML, and many others. Its purpose is to prevent intensive disk I/O, CPU processing, and load times when a folder that contains a large number of files is set to display each file as a thumbnail. This effect is more clearly seen when accessing a DVD containing thousands of photos without the thumbs.db file and setting the view to show thumbnails next to the filenames. Thumbnail caching was introduced in Windows 2000; wherein the thumbnails wer ...
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Extended File Attributes
Extended file attributes are file system features that enable users to associate computer files with metadata not interpreted by the filesystem, whereas regular attributes have a purpose strictly defined by the filesystem (such as permissions or records of creation and modification times). Unlike forks, which can usually be as large as the maximum file size, extended attributes are usually limited in size to a value significantly smaller than the maximum file size. Typical uses include storing the author of a document, the character encoding of a plain-text document, or a checksum, cryptographic hash or digital certificate, and discretionary access control information. In Unix-like systems, extended attributes are usually abbreviated as xattr. Implementations AIX In AIX, the JFS2 v2 filesystem supports extended attributes, which are accessible using the command. The , , , , and APIs support fetching, setting, listing, getting information about, and removing extended attribu ...
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Desktop
A desktop traditionally refers to: * The surface of a desk (often to distinguish office appliances that fit on a desk, such as photocopiers and printers, from larger equipment covering its own area on the floor) Desktop may refer to various computer terms: * Desktop computer, a personal computer designed to fit on a desk ** Pizza box form factor, a design of computer case * Desktop metaphor in computing, the area behind the "windows" in a graphical user interface for the operating system **Desktop environment, software that provides a comprehensive computer user interface **Remote desktop software, software that allows a personal computer's desktop environment to be run remotely on one system * Client (computing), sometimes referred to as a ''desktop'' to distinguish a Client from the Server * Desktop (word processor), a program for Sinclair ZX Spectrum and compatible computers See also * * *Laptop A laptop, laptop computer, or notebook computer is a small, portabl ...
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Google Drive
Google Drive is a file storage and synchronization service developed by Google. Launched on April 24, 2012, Google Drive allows users to store files in the cloud (on Google's servers), synchronize files across devices, and share files. In addition to a web interface, Google Drive offers apps with offline capabilities for Windows and macOS computers, and Android and iOS smartphones and tablets. Google Drive encompasses Google Docs, Google Sheets, and Google Slides, which are a part of the Google Docs Editors office suite that permits collaborative editing of documents, spreadsheets, presentations, drawings, forms, and more. Files created and edited through the Google Docs suite are saved in Google Drive. Google Drive offers users 15  GB of free storage through Google One. Google One also offers 100 GB, 200 GB, 2  TB, offered through optional paid plans. Files uploaded can be up to 750 GB in size. Users can change privacy settings for individual files a ...
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Stack Exchange
Stack Exchange is a network of question-and-answer (Q&A) websites on topics in diverse fields, each site covering a specific topic, where questions, answers, and users are subject to a reputation award process. The reputation system allows the sites to be self-moderating. As of August 2019, the three most actively-viewed sites in the network are Stack Overflow, Super User, and Ask Ubuntu. All sites in the network are modeled after the initial site Stack Overflow, a Q&A site for computer programming questions created by Jeff Atwood and Joel Spolsky. Further Q&A sites in the network are established, defined and eventually if found relevant brought to creation by registered users through a special site named Area 51. User contributions since May 2, 2018 are licensed under Creative Commons Attribution-ShareAlike 4.0 International. Older content, contributed while the site used the Creative Commons Attribution-ShareAlike 3.0 Unported license or the earlier Creative Comm ...
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AppleDouble
AppleSingle Format and AppleDouble Format are file formats developed by Apple Computer to store Mac OS "dual-forked" files on the Unix filesystem being used in A/UX, the Macintosh platform's first Unix-like operating system. AppleSingle combined both file forks and the related Finder meta-file information into a single file, whereas AppleDouble stored them as two separate files. Support for the formats was later added to Unix software such as NFS and MAE, but they saw little use outside this small market. AppleSingle is similar in concept to the more popular MacBinary format, in that the resource and data forks are combined with a header containing the Finder information. In fact, the format is so similar, it seemed there was no reason why Apple did not simply use MacBinary instead, which by that point was widely known and used. Some not-so-obvious reasons are explained in an Internet Draft. The format was later assigned the MIME type . AppleDouble leaves the data fork in its o ...
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ZIP (file Format)
ZIP is an archive file format that supports lossless data compression. A ZIP file may contain one or more files or directories that may have been compressed. The ZIP file format permits a number of compression algorithms, though DEFLATE is the most common. This format was originally created in 1989 and was first implemented in PKWARE, Inc.'s PKZIP utility, as a replacement for the previous ARC compression format by Thom Henderson. The ZIP format was then quickly supported by many software utilities other than PKZIP. Microsoft has included built-in ZIP support (under the name "compressed folders") in versions of Microsoft Windows since 1998 via the "Windows Plus!" addon for Windows 98. Native support was added as of the year 2000 in Windows ME. Apple has included built-in ZIP support in Mac OS X 10.3 (via BOMArchiveHelper, now Archive Utility) and later. Most free operating systems have built in support for ZIP in similar manners to Windows and Mac OS X. ZIP fil ...
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Archive File
In computing, an archive file is a computer file that is composed of one or more files along with metadata. Archive files are used to collect multiple data files together into a single file for easier portability and storage, or simply to compress files to use less storage space. Archive files often store directory structures, error detection and correction information, arbitrary comments, and sometimes use built-in encryption. Applications Portability Archive files are particularly useful in that they store file system data and metadata within the contents of a particular file, and thus can be stored on systems or sent over channels that do not support the file system in question, only file contents – examples include sending a directory structure over email, files with names unsupported on the target file system due to length or characters, and retaining files' date and time information. Additionally, it facilitates transferring high numbers of small files such as re ...
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Revision Control
In software engineering, version control (also known as revision control, source control, or source code management) is a class of systems responsible for managing changes to computer programs, documents, large web sites, or other collections of information. Version control is a component of software configuration management. Changes are usually identified by a number or letter code, termed the "revision number", "revision level", or simply "revision". For example, an initial set of files is "revision 1". When the first change is made, the resulting set is "revision 2", and so on. Each revision is associated with a timestamp and the person making the change. Revisions can be compared, restored, and, with some types of files, merged. The need for a logical way to organize and control revisions has existed for almost as long as writing has existed, but revision control became much more important, and complicated, when the era of computing began. The numbering of book editions ...
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Mac OS X 10
macOS (; previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac computers. Within the market of desktop and laptop computers it is the second most widely used desktop OS, after Microsoft Windows and ahead of ChromeOS. macOS succeeded the classic Mac OS, a Mac operating system with nine releases from 1984 to 1999. During this time, Apple cofounder Steve Jobs had left Apple and started another company, NeXT, developing the NeXTSTEP platform that would later be acquired by Apple to form the basis of macOS. The first desktop version, Mac OS X 10.0, was released in March 2001, with its first update, 10.1, arriving later that year. All releases from Mac OS X 10.5 Leopard and after are UNIX 03 certified, with an exception for OS X 10.7 Lion. Apple's other operating systems (iOS, iPadOS, watchOS, tvOS, audioOS) are derivatives of macOS. A pro ...
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USB Flash Drive
Universal Serial Bus (USB) is an industry standard that establishes specifications for cables, connectors and protocols for connection, communication and power supply ( interfacing) between computers, peripherals and other computers. A broad variety of USB hardware exists, including 14 different connector types, of which USB-C is the most recent and the only one not currently deprecated. First released in 1996, the USB standards are maintained by the USB Implementers Forum (USB-IF). The four generations of USB are: USB 1.''x'', USB 2.0, USB 3.''x'', and USB4. Overview USB was designed to standardize the connection of peripherals to personal computers, both to communicate with and to supply electric power. It has largely replaced interfaces such as serial ports and parallel ports, and has become commonplace on a wide range of devices. Examples of peripherals that are connected via USB include computer keyboards and mice, video cameras, printers, portable media ...
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