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+The Plan 9 software is provided under the terms of the
+Lucent Public License, Version 1.02, reproduced in the
+file /lib/legal/lpl, with the following notable exceptions:
+
+1. No right is granted to create derivative works of or
+ to redistribute (other than with the Plan 9 Operating System)
+ the screen imprinter fonts identified in subdirectory
+ /lib/font/bit/lucida and printer fonts (Lucida Sans Unicode, Lucida
+ Sans Italic, Lucida Sans Demibold, Lucida Typewriter, Lucida Sans
+ Typewriter83), identified in subdirectory /sys/lib/postscript/font.
+ These directories contain material copyrights by B&H Inc. and Y&Y Inc.
+
+2. The printer fonts identified in subdirectory /sys/lib/ghostscript/font
+ are subject to the GNU GPL, reproduced in the file /lib/legal/gpl.
+
+3. The ghostscript program in the subdirectory /sys/src/cmd/gs is
+ covered by the Aladdin Free Public License, reproduced in the file
+ /lib/legal/afpl.
+
+Other, less notable exceptions are marked in the file tree with
+COPYING, COPYRIGHT, or LICENSE files.