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https://sites.google.com/a/goethemail.net/gomenasai/_/rsrc/1401994082978/introduction-to-the-second-term/Virtualbox_running_vm.jpg?height=255&width=320

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A virtual machine (abbreviated VM) is a software implementation of a computing environment in which an operating system or program can be installed and run. It emulates a physical computing environment, but requests for CPU, memory, hard disk, network and other hardware resources. VMs are created within a virtualization layer that runs on top of a client or server operating system. This operating system is known as thehost OS. The virtualization layer can be used to create many individual, isolated VM environments.

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Software is divided into two main categories

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Software is divided into two main categories

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System software-> controls the basic functions of a computer and

comes usually preinstalled with the machine.

Application software-> handles multitudes of common and specialized

tasks a user wants to perform, such as accounting, communicating,

data processing, word processing.

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Software consists of the programs and applications

that run on computers. Because software runs on

computer hardware, software programs often have

system requirements that list the minimum hardware

required for the software to run. It has organized

instructions and code written by programmers in any

of various special computer languages.

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The hardware of a computer is all the physycal parts of a

computer (mechanical, electronic and electrical), for

example the CPU, main memory, power supply, storage

controllers, graphic controllers etc.

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Computer Basics: Understanding Operating Systems

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                                                                                                                                                                                             Operating System

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                                                                                                                                                                                             Operating System

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An operating system is the basic structure on which the computer runs. It communicates with the hardware and allows other programs to un, that includes a desktop and the ability to manage files and folders.

Every electronic device needs an operating system. It provides the user with an interface as well as hardware support. Operating systems also have an input and an output, that communicates with hardware

and interacts with any application or software that might be using that hardware.