Re: question about virtual machines
When people talk about virtual machines they're usually referring to Oracle VM VirtualBox or most often its VMware Workstation.
As Phazors explained, its basically like a separate computer. Imagine having 10 laptops in front of you, it would result in a lot of clutter as you have 10 sets of keyboards/trackpads/screens etc.
But with a virtual machine you share resources from 1 computer, and make as many virtual machines (as possible). You can then use them all simultaneously without the extra hassle that goes with having 10 laptops isolated from one another, i.e. copy files between them without emailing it to each other etc.
Best way to understand it is to get hands on with it. I believe VMware offer a months trial.
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