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#### 32.10.8 Terminal I/O Encoding

Emacs can use coding systems to decode keyboard input and encode terminal output. This is useful for terminals that transmit or display text using a particular encoding, such as Latin-1. Emacs does not set `last-coding-system-used` when encoding or decoding terminal I/O.

Function: keyboard-coding-system &optional terminal

  This function returns the coding system used for decoding keyboard input from terminal. A value of `no-conversion` means no decoding is done. If terminal is omitted or `nil`, it means the selected frame’s terminal. See Multiple Terminals.

Command: set-keyboard-coding-system coding-system &optional terminal

  This command specifies coding-system as the coding system to use for decoding keyboard input from terminal. If coding-system is `nil`, that means not to decode keyboard input. If terminal is a frame, it means that frame’s terminal; if it is `nil`, that means the currently selected frame’s terminal. See Multiple Terminals.

Function: terminal-coding-system &optional terminal

  This function returns the coding system that is in use for encoding terminal output from terminal. A value of `no-conversion` means no encoding is done. If terminal is a frame, it means that frame’s terminal; if it is `nil`, that means the currently selected frame’s terminal.

Command: set-terminal-coding-system coding-system &optional terminal

  This command specifies coding-system as the coding system to use for encoding terminal output from terminal. If coding-system is `nil`, that means not to encode terminal output. If terminal is a frame, it means that frame’s terminal; if it is `nil`, that means the currently selected frame’s terminal.