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GNU Cobol (formerly OpenCOBOL) is a free COBOL compiler. cobc translates COBOL to executable using intermediate C sources, providing full access to nearly all C libraries.

OpenCOBOL 1.1 continues on as GNU Cobol 1.1 Officially posted to, also available here.

Please see

A superb manual by Gary Cutler, along with a FAQ / How-To, and other documentation is indexed at

OpenCOBOL is

Copyright (C) 2001-2009 Keisuke Nishida Copyright (C) 2007-2012 Roger While

As above, GNU Cobol is also authored by Simon Sobisch, Sergey Kashyrin, Joe Robbins, Ron Norman

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.

The libcob run time support source tree is LGPL.