There are a number of different ``flavors'' of Unix available today. By different ``flavors'' I mean different command interpreters (called shells) which handle your input in their own unique way. This manual covers the C shell only. Many of the things found here will be identical with other shells, but don't count on it. It is possible to determine which shell is in use by typing echo $SHELL. The response for the C shell is /bin/csh which is what you should get. One other popular shell is the Bourne shell which would respond with /bin/sh.