What is Free and Open Source Software  Home ToC Prev Up Next 
Introduction
Principles
Geopolitics of Software Industry
History
"Sociology" of the movement
Legal considerations
Software Protection / Control
The 4 freedoms, again
Protections vs. Control
Software Patents
+Categories of Licences :
Choosing a licence
GPL and LGPL
FAQ: Open Source vs. Free  Software
Choosing Free/OpenSource software
Why address this question in classes at INT
Miscelleanous
Appendices
  

Categories of Licences :

Two main categories :

  • "Public Domain" like (BSD, X11)

  • Copylefted (e.g. GPL, LGPL) :

    • Freedom to change the software

    • No possibility to change the licence terms

One single piece of software may have mixed licences : dual-licensing (Qt, MySQL, ...)
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