Two graduate students originally developed Samba in their spare time and

it was deployed noncommercially in academic environments\footnote{See

  \href{http://turtle.ee.ncku.edu.tw/docs/samba/history}{Andrew Tridgell's

soon for-profit companies discovered that the software could work for them

as well, and their system administrators began to use it in place of

Microsoft Windows NT file-servers.  This served to lower the cost of

answer to that problem, and began using various copyleft licenses for the

early GNU project programs\footnote{RMS writes more fully about this topic in

  his essay entitled simply

    For those who want to hear the story in his own voice,

    \href{http://audio-video.gnu.org/audio/}{speech recordings} of his talk,

    \textit{The Free Software Movement and the GNU/Linux Operating System}

``subroutine'' that could be reused not just for all FSF-copyrighted

programs, but also by anyone else.  As the FSF claimed in its announcement of

the GPLv1\footnote{The announcement of GPLv1 was published in the

  \href{http://www.free-soft.org/gpl_history/}{consolidation of research on

\begin{quotation}

To make it easier to copyleft programs, we have been improving on the

legalbol architecture of the General Public License to produce a new version