The name "dotfiles" comes from the traditional format for UNIX user configuration files. On most UNIX systems, the configuration file names begin with a "." (dot), to make them hidden from the casual user.
These files are example user configuration files for tcsh (TENEX C shell) on OS X (tcsh is the OS X default shell). They are the latest versions of the files posted at Dotfiles.com. These files implement tcsh user configuration options that complement the standard system-wide tcsh options.
For tcsh, the traditional user configuration filenames are .tcshrc (TENEX C shell run command) and .login. For tcsh on OS X, the user configuration files have a somewhat different format. There are multiple configuration files with different file names reflecting the files' purpose. The files are located in the directory /Users/<username>/Library/init/tcsh/. The following sources have information on tcsh configuring and configuration files: