软件行业本身就建立在copy的基础上的，据说视窗both Windows and Mac OS都借鉴了施乐的。
国内的很多的软件质量真的好差呀。
https://queue.acm.org/detail.cfm?id=945125
Jay Michaelson - There's No Such Thing as a Free (Software) Lunch
"The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software to make sure the software is free for all its users." So begins the GNU General Public License, or GPL, which has become the most widely used of open source software licenses. Freedom is the watchword; it's no coincidence that the organization that wrote the GPL is called the Free Software Foundation and that open source developers everywhere proclaim, "Information wants to be free."