You are now in the directory "shells".
Here are the one-line descriptions for each items in this directory:
bash-1.14.6: bash, the GNU Borne Again Shell. pdksh-5.2.7: The Public Domain Korn Shell. tcsh-6.06: TCSH shell (csh-like) V6.06 zsh-3.0a2: Zsh - the Z shell