When I first found VirtualBox and created my first Virtual Machine VirtualBox was still owned by a small company in Germany. Few people know of the project and fewer thought it was a good idea to build and distribute pre-installed virtual machines.
Along the was VirtualBox was purchased by Sun Micro System. Then Sun Micro Systems was purchased by Oracle.
My original goal was to become familiar with Linux servers and Linux desktops because clients were interested in a lower cost solution to Microsoft Windows solutions.