zsh version 3.1.0 has been installed as /exp/rcf/share/bin/zsh for all supported UNIX platforms

What is zsh?
Zsh is a UNIX command interpreter (shell) usable as an interactive login shell and as a shell script command pro- cessor. Of the standard shells, zsh most closely resembles ksh but includes many enhancements. Zsh has comand line editing, builtin spelling correction, programmable command completion, shell functions (with autoloading), a history mechanism, and a host of other features.