For Software related questions:

 - List your operating system (Windows, Mac OS X, Red Hat Enterprise Linux, Solaris, Centos, Fedora, Ubuntu, FreeBSD, etc.) with version numbers
 - List your Hardware architecture (i386, x86-64, SPARC, PPC, etc.)
 - List specific versions of relevant components (e.g. Linux kernel version, Python version, Java Virtual Machine version/provider, PHP version, httpd version, etc.)