Version 2, June 1991 Copyright © 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave, Cambridge, MA 02139, USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. &licenses-gpl-preamble; &licenses-gpl-terms-and-conditions; &licenses-gpl-how-to-apply-this-license;