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Archive Bit
The archive bit is a file attribute used by CP/M, Microsoft operating systems, OS/2, and AmigaOS. It is used to indicate whether or not the file has been backed up (archived). Usage In Windows and OS/2, when a file is created or modified, the archive bit is set (i.e. turned on), and when the file has been backed up, the archive bit is cleared (i.e. turned off). Thus, the meaning of the archive bit is "this file has not been archived". In CP/M, the meaning is inverted: creating or modifying a file clears the archive bit, and the bit is set when the file is backed up. Backup software may provide the option to do a full backup while clearing archive bits – that is, to back up all files regardless of their archive bit status, and to clear the archive bit for all files processed by the backup. This allows for the creation of an initial full backup that will be supplemented by incremental backups in the future. Later, the incremental backup task uses the archive bit to distingui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
File Attribute
File attributes are a type of metadata that describe and may modify how files and/or directories in a filesystem behave. Typical file attributes may, for example, indicate or specify whether a file is visible, modifiable, compressed, or encrypted. The availability of most file attributes depends on support by the underlying filesystem (such as FAT, NTFS, ext4) where attribute data must be stored along with other control structures. Each attribute can have one of two states: set and cleared. Attributes are considered distinct from other metadata, such as dates and times, filename extensions or file system permissions. In addition to files, folders, volumes and other file system objects may have attributes. DOS and Windows Traditionally, in DOS and Microsoft Windows, files and folders accepted four attributes: * Archive (A): When set, it indicates that the hosting file has changed since the last backup operation. Windows' file system sets this attribute on any file that has ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windows Shell
The Windows shell is the graphical user interface for the Microsoft Windows operating system. Its readily identifiable elements consist of the desktop, the taskbar, the Start menu, the task switcher and the AutoPlay feature. On some versions of Windows, it also includes Flip 3D and the charms. In Windows 10, the Windows Shell Experience Host interface drives visuals like the Start Menu, Action Center, Taskbar, and Task View/Timeline. However, the Windows shell also implements a shell namespace that enables computer programs running on Windows to access the computer's resources via the hierarchy of shell objects. "Desktop" is the top object of the hierarchy; below it there are a number of files and folders stored on the disk, as well as a number of special folders whose contents are either virtual or dynamically created. Recycle Bin (Windows), Recycle Bin, Features new to Windows 7#Libraries, Libraries, Control Panel (Windows), Control Panel, My Computer, This PC and My Network Pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Archives
A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations (''computation''). Modern digital electronic computers can perform generic sets of operations known as ''programs'', which enable computers to perform a wide range of tasks. The term computer system may refer to a nominally complete computer that includes the hardware, operating system, software, and peripheral equipment needed and used for full operation; or to a group of computers that are linked and function together, such as a computer network or computer cluster. A broad range of industrial and consumer products use computers as control systems, including simple special-purpose devices like microwave ovens and remote controls, and factory devices like industrial robots. Computers are at the core of general-purpose devices such as personal computers and mobile devices such as smartphones. Computers power the Internet, which links billions of computer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glossary Of Backup Terms
The subject of computer backups is rife with jargon and highly specialized terminology. This page is a glossary of backup terms that aims to clarify the meaning of such jargon and terminology. Terms and definitions 3-2-1 Rule (or 3-2-1 Backup Strategy) :The idea that a minimal backup solution should include three copies of the data, including two local copies and one remote copy. Backup policy : an organization's procedures and rules for ensuring that adequate numbers and types of backups are made, including suitably frequent testing of the process for restoring the original production system from the backup copies. Backup rotation scheme : a method for effectively backing up data where multiple media are systematically moved from storage to usage in the backup process and back to storage. There are several different schemes. Each takes a different approach to balance the need for a long retention period with frequently backing up changes. Some schemes are more complica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
File Attribute
File attributes are a type of metadata that describe and may modify how files and/or directories in a filesystem behave. Typical file attributes may, for example, indicate or specify whether a file is visible, modifiable, compressed, or encrypted. The availability of most file attributes depends on support by the underlying filesystem (such as FAT, NTFS, ext4) where attribute data must be stored along with other control structures. Each attribute can have one of two states: set and cleared. Attributes are considered distinct from other metadata, such as dates and times, filename extensions or file system permissions. In addition to files, folders, volumes and other file system objects may have attributes. DOS and Windows Traditionally, in DOS and Microsoft Windows, files and folders accepted four attributes: * Archive (A): When set, it indicates that the hosting file has changed since the last backup operation. Windows' file system sets this attribute on any file that has ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unix
Unix (, ; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T Unix, whose development started in 1969 at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others. Initially intended for use inside the Bell System, AT&T licensed Unix to outside parties in the late 1970s, leading to a variety of both academic and commercial Unix variants from vendors including University of California, Berkeley ( BSD), Microsoft (Xenix), Sun Microsystems ( SunOS/ Solaris), HP/ HPE ( HP-UX), and IBM ( AIX). The early versions of Unix—which are retrospectively referred to as " Research Unix"—ran on computers such as the PDP-11 and VAX; Unix was commonly used on minicomputers and mainframes from the 1970s onwards. It distinguished itself from its predecessors as the first portable operating system: almost the entire operating system is written in the C programming language (in 1973), which allows U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timestamp
A timestamp is a sequence of characters or encoded information identifying when a certain event occurred, usually giving date and time of day, sometimes accurate to a small fraction of a second. Timestamps do not have to be based on some absolute notion of time, however. They can have any epoch, can be relative to any arbitrary time, such as the power-on time of a system, or to some arbitrary time in the past. A distinction is sometimes made between the terms datestamp, timestamp and date-timestamp: * Datestamp or DS: A date, for example -- according to ISO 8601 * Timestamp or TS: A time of day, for example :: using 24-hour clock * Date-timestamp or DTS: Date and time, for example --, :: History The term "timestamp" derives from rubber stamps used in offices to stamp the current date, and sometimes time, in ink on paper documents, to record when the document was received. Common examples of this type of timestamp are a postmark on a letter or the "in" and "out" times on a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JScript
JScript is Microsoft's legacy dialect of the ECMAScript standard that is used in Microsoft's Internet Explorer web browser and HTML Applications, and as a standalone Windows scripting language. JScript is implemented as an Active Scripting engine. This means that it can be "plugged in" to OLE Automation applications that support Active Scripting, such as Internet Explorer, Active Server Pages, and Windows Script Host. It also means such applications can use multiple Active Scripting languages, e.g., JScript, VBScript or PerlScript. JScript was first supported in the Internet Explorer 3.0 browser released in August 1996. Its most recent version is JScript 9.0, included in Internet Explorer 9. JScript 10.0 is a separate dialect, also known as JScript .NET, which adds several new features from the abandoned fourth edition of the ECMAScript standard. It must be compiled for .NET Framework version 2 or version 4, but static type annotations are optional. JScript has been c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VBScript
VBScript (Microsoft Visual Basic Scripting Edition) is a deprecated programming language for scripting on Microsoft Windows using Component Object Model (COM), based on classic Visual Basic and Active Scripting. It was popular with system administrators for managing computers and automating many aspects of computing environments, and has been installed by default in every desktop release of Microsoft Windows since Windows 98; in Windows Server since Windows NT 4.0 Option Pack; and optionally with Windows CE (depending on the device it is installed on). VBScript running environments include: Windows Script Host (WSH), Internet Explorer (IE), and Internet Information Services (IIS). The running environment is embeddable in other programs via the Microsoft Script Control (). In October 2023, Microsoft announced that VBScript was deprecated. In May 2024, a multi-phase deprecation schedule was announced with disabling it by default "around 2027" and removing it sometime later. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windows Explorer
File Explorer, previously known as Windows Explorer, is a file manager application and default desktop environment that is included with releases of the Microsoft Windows operating system from Windows 95 onwards. It provides a graphical user interface for accessing the file systems, as well as user interface elements such as the taskbar and desktop. The application was renamed from "Windows Explorer" to "File Explorer" in Windows 8; however, the old name of "Windows Explorer" can still be seen in the Windows Task Manager. Overview Windows Explorer was first included with Windows 95 as a replacement for File Manager, which came with all versions of Windows 3.x operating systems. Explorer could be accessed by double-clicking the new My Computer desktop icon or launched from the new Start Menu that replaced the earlier Program Manager. There is also a shortcut key combination: . Successive versions of Windows (and in some cases, Internet Explorer) introduced new features and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attrib
In computing, ATTRIB is a command in Intel ISIS-II, DOS, IBM OS/2, Microsoft Windows and ReactOS that allows the user to change various characteristics, or " attributes" of a computer file or directory. The command is also available in the EFI shell. History Several operating systems provided a set of modifiable file characteristics that could be accessed and changed through a low-level system call. For example, as of release MS-DOS 4.0, the first six bits of the file attribute byte indicated whether or not a file was read-only (as opposed to writeable), hidden, a system file, a volume label, a subdirectory, or if the file had been "archived" (with the bit being set if the file had changed since the last use of the BACKUP command). However, initial releases of the operating system did not provide user-level method for reading or changing these values. The initial version of the ATTRIB command for DOS was first included in version 3.0 of PC DOS, with functionality limited to ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
