Howtogeek posted The Beginners Guide to Parallels Desktop 10 for OS X
A quote from the article:
Even if you are a Mac user, there's a strong chance that you will need to use Windows applications at some point. Luckily there are great virtual machine solutions out there to help you do that easily.The Beginners Guide to Parallels Desktop 10 for OS X @ Howtogeek
And you can run more than Windows in a virtual machine ? Linux runs perfectly in a VM, and is usually the best way to learn. Today we'll be showing you how to install Windows in Parallels Desktop, but the same principles work for Linux.