These files are the Research Unix Sixth Edition distribution, downloaded from
https://www.tuhs.org/Archive/Distributions/Research/Dennis_v6/.
They are distributed under the terms of the license posted at
https://www.tuhs.org/Archive/Caldera-license.pdf and
reproduced in LICENSE.pdf and LICENSE.txt.

Additional files have been added to the file system in the running system,
in /usr/dmr and /usr/ken from parts of the TUHS archive:
https://www.tuhs.org/Archive/Applications/Dennis_Tapes/