Hi, First, please, forgive me if this subject have been discussed already, but I couldn't find anything in the lists archives and Boost docs. Today, my friend was told (warned) on the #c++ IRC channel that Boost uses some technologies already patented by IBM (and may be other entities), like RCU or SMR (and may be more). I have no idea if this is true or not, so I'd like to ask some questions regarding this warning: 1. Does Boost use any patented technologies? 2. If it does, and for example it uses some in library X, does it mean I can not use library Y (without copying X) in my program because of patents-derived restrictions? In other words, if Boost uses any patented technologies in library X, does it influence other libraries? What are implications regarding it? I appologize if something is not clear, but I'm not a lawyer at all, so it may be hard for me to express my considerations. But I hope it's understandable :-) Thanks in advance for any clarification. Cheers -- Mateusz Loskot http://mateusz.loskot.net