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1.5 What are FSF, LPF, GNU, RMS, FTP, and GPL?

Free Software Foundation
League for Programming Freedom
GNU's Not Unix
Richard Matthew Stallman
File Transfer Protocol
GNU General Public License

Avoid confusing the FSF and the LPF. The LPF opposes look-and-feel copyrights and software patents. The FSF aims to make high quality free software available for everyone.

The word “free” in the title of the Free Software Foundation refers to “freedom,” not “zero cost.” Anyone can charge any price for GPL-covered software that they want to. However, in practice, the freedom enforced by the GPL leads to low prices, because you can always get the software for less money from someone else, since everyone has the right to resell or give away GPL-covered software.