untermud/DOC/
untermud/DOC/U/
untermud/DOC/U/U-examples/
untermud/DOC/internals/
untermud/DOC/wizard/
untermud/MISC/
untermud/MISC/dbchk/
untermud/RWHO/
untermud/RWHO/rwhod/
use             use [thing].  This is the same command as 'hold'.