"...The leading software project in the open source radio world is called GNU Radio. GNU refers to a software movement started in the 70s by a proto-hippie-geek by the name of Richard Stallman. Stallman was the first software developer to publicly espouse the "free love" approach to software copyrights that lead to such modern marvels as Linux. (The computer hosting this webpage runs Linux, and Linux will be bringing you almost every other webpage you visit today. Thanks, free software! Read more on Richard Stallman here.)..."