Comparing \libs\libraries.htm and \doc\html\libraries.html I found that even more libraries are not listed: assign enable_if in_placed_factory min_max multi_index numeric/conversion Also, names in these two lists don't match (i.e. Thread and Threads and so on). Funnily, there is also retired library Compose in list at \doc\html\libraries.html and libraries are not alphabetical order. -- Pavel Chikulaev