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A variety of technologies for managing computer resources by providing a software interface, known as an "abstraction layer," between the software (operating system and applications) and the hardware. Virtualization turns "physical" RAM and storage into "logical" resources. Following are the ways virtualization is used. See logical vs. physical.

Hardware Virtualization
Partitioning the computer's memory into separate and isolated "virtual machines" simulates multiple machines within one physical computer. It enables multiple copies of the same or different operating systems to run in the computer and also prevents applications from interfering with each other. See virtual machine and OS virtualization.

Network and Storage Virtualization
In a network, virtualization consolidates multiple devices into a logical view so they can be managed from a single console (see network virtualization). Virtualization also enables multiple storage devices to be accessed the same way no matter what their type or location (see storage virtualization).

Application Virtualization
Computer people love the word "virtualization," and vendors use the term for virtually anything. Numerous technologies fall under the umbrella of "application virtualization," some of which have been around for decades, while others are at the forefront. See application virtualization.
References in periodicals archive ?
AppSense user virtualization technology delivers personalized corporate desktops without the need for cumbersome profiles or scripts across all delivery platforms - including physical, virtual, streamed, published and off-line.
Also, the OpenVZ project maintains a blog site discussing virtualization technology, which can be accessed here, http://blog.
Moving beyond traditional high availability, Marathon sets a new standard for application availability using its patented virtualization technology that embraces off-the-shelf servers, Windows and business process applications.
Intel took a major step toward accelerating virtualization with the introduction of our first processors with integrated Intel[R] Virtualization Technology more than a year ago, and we have built a broad software ecosystem to support it," said Boyd Davis, general manager of Intel Server Platform Group Marketing.
develops the leading enterprise grade platform virtualization solution, XenEnterprise[TM], based on the industry's highest-performance virtualization technology, the open source Xen[TM] hypervisor.
SWsoft Virtuozzo is one example of operating system (OS)-level server virtualization technology cited in the report, which can be accessed from the SWsoft website (www.
Built on standards-based multi-core Intel processors with Intel[R] Virtualization Technology (Intel VT), the product allows users to combine, scale, and virtualize BladeSymphony blades based on Dual-Core Intel([R]) Itanium([R]) 2 9000 Series processors.
Aside from its breakthrough virtualization technology, BladeSymphony with Virtage also solves scalability issues on an enterprise scale.
Virtuozzo the Only Virtualization Technology Represented in the Top 10