JEAN was a dialect of the JOSS programming language developed for and used on ICT 1900 series computers in the late 1960s and early 1970s; it was implemented under the MINIMOP operating system. It was used at the University of Southampton.
JEAN was an acronym derived from "JOSS Extended and Adapted for Nineteen-hundred". It was operated from a Teletype terminal.
References
JEAN Wikipedia(Text) CC BY-SA