Open Source, a term understood well by the technology set, but not enough by everyone.
Open Source for the software industry is like generic drugs for the pharmaceutical industry. It enables more players to come to the table, it is a huge driving force behind internet infrastructures, which are built on Linux, Apache and many other technologies. It is the backbone of companies like google, and facilitates cloud services from the likes of Amazon EC2, Joyent, Rackspace and many others.
It is the rising tide that lifts all boats, if you will.