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C shell

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 Today, the C shell is not in wide use; it has been superseded by other shells such as tcsh, the Korn shell (ksh), and the GNU Bourne-Again shell (bash).

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C Shell programming considered harmful (by Tom Christiansen)