What Is Virtualization?

Virtualization was originally pioneered more than 40 years ago by IBM in order to distribute costly mainframe resources and run multiple applications. At the time, computers were far too expensive to be tied up computing single tasks. Virtualization allowed the host computer to run many more “virtual” computers at the same time—duplicates of the host computer. Pretty cool!

Eventually the necessity and cost of maintaining expensive, distributed computing decreased, so virtualization was no longer necessary. The decrease in mainframe computing coincided with advances in personal computers (PCs). Personal computing meant that end users finally had the ability to run both their operating system and their applications locally, ...

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