The
C shell (
csh) is a
Unix shell developed by William Joy for the
BSD Unix system. Its syntax is modeled after the
C programming language. The C shell added many feature improvements over the
Bourne shell, such as aliases and command history. Today, the C shell is not in wide use; it has been superseded by other shells such as
tcsh, the
Korn shell (ksh), and the
GNU Bourne-Again shell (bash).
C Shell programming considered harmful (by Tom Christiansen) (http://www.faqs.org/faqs/unix-faq/shell/csh-whynot/)