Osh is a re-implementation of the old and obsolete shell version,
which was in standard use up to UNIX 6th Edition and was supplied
as osh with UNIX 7th Edition.  Its command language is a sparse
subset of those of modern shells and is mostly common both to sh(1)
and csh(1).

- George Reid
greid@ukug.uk.freebsd.org

WWW: http://v6shell.org