Hi,
What is the difference between Bourne,Korn shell, C shell, BASH?
Thanks
Probably best to research this one yourself, because the answer is very long and involved. In short, ksh is sh with added features, csh syntax is more like C, tcsh is csh with added features, bash is highly compatible with ksh and takes some good features from tcsh. All shells are subtly different on different platforms and between versions, and may not be available on all platforms.
Try these resources:
Comparison of command shells - Wikipedia, the free encyclopedia
A's to Q's about BASH, the Bourne-Again SHell: Differences from other Unix shells
http://www.dartmouth.edu/~rc/classes/ksh/ksh-vs-sh.detail.html
http://www.in-ulm.de/~mascheck/various/shells/