4.32.2 ‘Extended ASCII Character set’

This declares what kind of character set extension your terminal supports. If the server supports it, it will send text using that character set. ‘None’ means the standard 95 printable ASCII characters. ‘ITS’ means ASCII extended with printable characters in the control character range. This character set is documented in the SUPDUP protocol definition. ‘WAITS’ is similar to ‘ITS’ but uses some alternative characters in the extended set: most prominently, it will display arrows instead of ^ and _, and } instead of ~. ‘ITS’ extended ASCII is used by ITS and Lisp machines, whilst ‘WAITS’ is only used by the WAITS operating system from the Stanford AI Laboratory.