The executable files were built on Sun Oct 30 10:36:22 EDT 2011 The version number of each individual application may be found in the appropriate documentation files in ./ncbi/doc/ uname -a ouput is: Linux icoremake1 2.6.5-7.312-bigsmp #1 SMP Fri Jun 6 13:44:33 UTC 2008 i686 i686 i386 GNU/Linux