This is the Debian GNU/Linux prepackaged version of scm. This package was put together by Karl Sackett , and upgraded by James LewisMoss from sources obtained from: ftp://swissnet.ai.mit.edu/ftpdir/scm/scm5d9.tar.gz For more information see: http://www-swiss.ai.mit.edu/~jaffer/SCM Author: Aubrey Jaffer Further portions written by: Richard E. Harke Tanel Tammet William Clinger Mkinen Sami Jarkko Leppanen The Free Software Foundation Paradigm Associates Inc. Digital Equipment Corp. Tektronix, Inc. Copyright: 1984-2006 by the Free Software Foundation 1996, 2000-2001, 2003, 2007 by Aubrey Jaffer Portions Copyright: 1990 by W. Wilson Ho 1992-1997 by Tanel Tammet 1992 by William Clinger 1989 by Paradigm Associates Inc. 1992 by Mkinen Sami and Jarkko Leppanen 1985-1991 by Digital Equipment Corp. 1990-1991 by Textronix, Inc. License: scm as a whole is distributed under the GNU General Public License. See /usr/share/common-licenses/GPL for details. Some individual source files and portions of the documentation can be distributed under more liberal terms as described in each file. As a special exception, the Free Software Foundation gives permission for additional uses of the text contained in its release of SCM. The exception is that, if you link the SCM library with other files to produce an executable, this does not by itself cause the resulting executable to be covered by the GNU General Public License. Your use of that executable is in no way restricted on account of linking the SCM library code into it. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License.