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Windows on Windows

Index Windows on Windows

In computing, Windows on Windows (commonly referred to as WOW) is a compatibility layer of 32-bit versions of the Microsoft Windows NT family of operating systems that extends NTVDM to provide limited support for running legacy 16-bit programs written for Windows 3.x or earlier. [1]

33 relations: Address space, Application programming interface, AUTOEXEC.BAT, Compatibility layer, Computing, CONFIG.SYS, DOS, DOSBox, File Allocation Table, Inter-process communication, Legacy code, Long filename, Microsoft, NTFS, Operating system, Pointer (computer programming), Principle of least privilege, Protection ring, Shim (computing), Thunk, Virtual DOS machine, Windows 3.1x, Windows 3.x, Windows 95, Windows 98, Windows 9x, Windows NT, Windows Server 2008 R2, Wine (software), WoW64, 16-bit, 32-bit, 8.3 filename.

Address space

In computing, an address space defines a range of discrete addresses, each of which may correspond to a network host, peripheral device, disk sector, a memory cell or other logical or physical entity.

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Application programming interface

In computer programming, an application programming interface (API) is a set of subroutine definitions, protocols, and tools for building software.

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AUTOEXEC.BAT

AUTOEXEC.BAT is a system file that was originally on DOS-type operating systems.

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Compatibility layer

In software engineering, a compatibility layer is an interface that allows binaries for a legacy or foreign system to run on a host system.

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Computing

Computing is any goal-oriented activity requiring, benefiting from, or creating computers.

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CONFIG.SYS

CONFIG.SYS is the primary configuration file for the DOS and OS/2 operating systems.

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DOS

DOS is a family of disk operating systems.

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DOSBox

DOSBOX (stylized as DOSBox) is an emulator program which emulates an IBM PC compatible computer running a DOS operating system.

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File Allocation Table

File Allocation Table (FAT) is a computer file system architecture and a family of industry-standard file systems utilizing it.

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Inter-process communication

In computer science, inter-process communication or interprocess communication (IPC) refers specifically to the mechanisms an operating system provides to allow the processes to manage shared data.

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Legacy code

Legacy code is source code that relates to a no-longer supported or manufactured operating system or other computer technology.

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Long filename

Long filename (LFN) support is Microsoft's backward compatible extension of the 8.3 filename (short filename) naming scheme used in DOS.

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Microsoft

Microsoft Corporation (abbreviated as MS) is an American multinational technology company with headquarters in Redmond, Washington.

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NTFS

NTFS (New Technology File System) is a proprietary file system developed by Microsoft.

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Operating system

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.

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Pointer (computer programming)

In computer science, a pointer is a programming language object that stores the memory address of another value located in computer memory.

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Principle of least privilege

In information security, computer science, and other fields, the principle of least privilege (PoLP, also known as the principle of minimal privilege or the principle of least authority) requires that in a particular abstraction layer of a computing environment, every module (such as a process, a user, or a program, depending on the subject) must be able to access only the information and resources that are necessary for its legitimate purpose.

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Protection ring

In computer science, hierarchical protection domains, often called protection rings, are mechanisms to protect data and functionality from faults (by improving fault tolerance) and malicious behaviour (by providing computer security).

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Shim (computing)

In computer programming, a shim is a small library that transparently intercepts API calls and changes the arguments passed, handles the operation itself or redirects the operation elsewhere.

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Thunk

In computer programming, a thunk is a subroutine used to inject an additional calculation into another subroutine.

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Virtual DOS machine

Virtual DOS machine (VDM) is a technology that allows running 16-bit/32-bit DOS and 16-bit Windows programs on Intel 80386 or higher computers when there is already another operating system running and controlling the hardware.

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Windows 3.1x

Windows 3.1x (codenamed Janus) is a series of 16-bit operating environments produced by Microsoft for use on personal computers.

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Windows 3.x

Windows 3.x means either of, or all of the following versions of Microsoft Windows.

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Windows 95

Windows 95 (codenamed Chicago) is a consumer-oriented operating system developed by Microsoft.

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Windows 98

Windows 98 (codenamed Memphis while in development) is a graphical operating system by Microsoft.

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Windows 9x

Windows 9x is a generic term referring to a series of Microsoft Windows computer operating systems produced from 1995 to 2000, which were based on the Windows 95 kernel and its underlying foundation of MS-DOS, both of which were updated in subsequent versions.

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Windows NT

Windows NT is a family of operating systems produced by Microsoft, the first version of which was released in July 1993.

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Windows Server 2008 R2

Windows Server 2008 R2 is a server operating system produced by Microsoft.

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Wine (software)

Wine (recursive backronym for Wine Is Not an Emulator) is a free and open-source compatibility layer that aims to allow computer programs (application software and computer games) developed for Microsoft Windows to run on Unix-like operating systems.

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WoW64

In computing on Microsoft platforms, WoW64 (Windows 32-bit on Windows 64-bit) is a subsystem of the Windows operating system capable of running 32-bit applications that is included in all 64-bit versions of Windows—including Windows XP Professional x64 Edition, IA-64 and x64 versions of Windows Server 2003, as well as 64-bit versions of Windows Vista, Windows Server 2008, Windows 7, Windows 8, Windows Server 2012, Windows 8.1 and Windows 10.

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16-bit

16-bit microcomputers are computers in which 16-bit microprocessors were the norm.

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32-bit

32-bit microcomputers are computers in which 32-bit microprocessors are the norm.

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8.3 filename

An 8.3 filename (also called a short filename or SFN) is a filename convention used by old versions of DOS and versions of Microsoft Windows prior to Windows 95 and Windows NT 3.5.

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Redirects here:

Windows On Windows, WoW16, Wowexec.

References

[1] https://en.wikipedia.org/wiki/Windows_on_Windows

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