gpl

title: gpl
description: copyleft, the gnu general public license
related: hosc, hsc3, hsc3-dot, hsc3-lang, hsc3-db, mk-r6rs, rhs, sosc, rsc3, rsc3-lang, smlsc3, sc3-ctl, sc3-dot, ssc3
external: http://gnu.org/copyleft/