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Prior to version 4, there were two different packages of the VirtualBox software. The full package was offered gratis under the PUEL, with licenses for other commercial deployment purchasable from Oracle. A second package called the VirtualBox Open Source Edition (OSE) was released under GPLv2. This removed the same proprietary components not ...
GPL version 2; full version with extra enterprise features is proprietary Virtual Iron 3.1 Virtual Iron Software, Inc., acquired by Oracle x86 VT-x, x86-64 AMD-V x86, x86-64 No host OS Windows, Linux Proprietary, some components GPLv2 [10] Virtual Machine Manager: Red Hat: x86, x86-64 x86, x86-64 Linux Linux, Windows GPL version 2
A hypervisor, also known as a virtual machine monitor (VMM) or virtualizer, is a type of computer software, firmware or hardware that creates and runs virtual machines.A computer on which a hypervisor runs one or more virtual machines is called a host machine, and each virtual machine is called a guest machine.
As with KQEMU, VirtualBox runs nearly all guest code natively on the host via the VMM (Virtual Machine Manager) and uses the re-compiler only as a fallback mechanism – for example, when guest code executes in real mode. [21] In addition, VirtualBox did a lot of code analysis and patching using a built-in disassembler to minimize recompilation.
A virtual appliance is a pre-configured virtual machine image, ready to run on a hypervisor; virtual appliances are a subset of the broader class of software appliances. ...
Full virtualization – Almost complete virtualization of the actual hardware to allow software environments, including a guest operating system and its apps, to run unmodified. Paravirtualization – The guest apps are executed in their own isolated domains, as if they are running on a separate system, but a hardware environment is not simulated.
Connectix Virtual PC version 3 in Mac OS 9, running a Brazilian Portuguese edition of Windows 95. Virtual PC was originally developed as a Macintosh application for System 7.5 and released by Connectix in June 1997. [5] The first version of Virtual PC designed for Windows-based systems, version 4.0, was released in June 2001. Virtual PC 4 was ...
It also provided "additions" code which greatly improves host–guest OS interactions in OS/2. The additions are not provided with the current version of VirtualPC, but the version last included with a release may still be used with current releases. At one point, OS/2 was a supported host for VirtualPC in addition to a guest.