is the command interpreter mode for interacting with external processes. Using the base comint-mode, Emacs provides derived modes for specific process-in-a-buffer. Common ones are shell, lisp, scheme, cmutex (for TeX and LaTeX). Support for programming languages with REPL interfaces, such as Haskell, are also derived from comint-mode. Such buffers share the same key bindings, shortcuts, and history manipulation facilities.

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