On Wednesday 20 July 2011 05:07:23 hadi motamedi wrote: > If we cannot find the exact application name for centos, say MATLAB > for centos does not exist, so we must search for 'Mathematics > laboratory for centos' ? MATLAB stands for *matrix* laboratory, not mathematics. See http://en.wikipedia.org/wiki/MATLAB Searching for MATLAB on CentOS is too naive. Rather, you just want to keep in mind that CentOS is binary-compatibile with RHEL, go to the MATLAB website and find out that there is a supported version for RHEL: http://www.mathworks.com/support/sysreq/current_release/linux.html It costs about 2000 USD for a basic standalone installation (btw, the price is the same for Linux, Windows and Mac). The functionality of MATLAB for CentOS is completely equivalent to the one on Windows. There is no alternative (free or otherwise) version which will provide equivalent functionality. That said, there are alternative apps which are equivalently powerful, but there are always differences. HTH, :-) Marko