Tcsh
Tcsh is an enhanced version of the C shell (csh), a Unix command-line interpreter and scripting language. It provides interactive command-line features like command-line editing, history, and job control, along with C-like syntax for scripting. It is commonly used as a login shell on Unix-like systems, particularly in academic and research environments.
Developers should learn Tcsh when working on legacy Unix systems, especially in academic or scientific computing contexts where it is historically prevalent. It is useful for interactive command-line work due to its advanced features like tab completion and aliases, but for modern scripting, alternatives like Bash or Zsh are generally preferred due to broader compatibility and more robust scripting capabilities.