2. Virtual Machine is allows to run multiple operating system on PC on asingle
physical platform. VM was originally defined by Popek and Goldbergas “an
efficient isolated dublicate of a real machine”.
Current use includes virtual machine which have no direct correspondence to
any real hard drive.
Also there is a software which name is VMware Workstation.
It runs onx86 or x86-64 computer.
This software you can set up one or more virtual machines on a single
hard drive and use of them simultaneously along with actual machine .
Each Virtual Machine can execute its own operation system, including version
of Microsoft Windows, BDS, Linux and MS-Dos.
3. Process Virtual Machine
Process Virtual Machine called an application virtual machine or managed run
time environment (MRE), runs a normal application inside the host OS and
support a single process. It is created when that process id started when its
exist. Its purpose to provide a platform independent programming
environment that abstract away details that underlying hardware of operation
system and allows program to execute in the same way on any platform.
