 JOSS was implemented almost entirely by J. Clifford Shaw, a mathematician who worked in Rand's growing computation division.It was written in a symbolic assembly language called EasyFox (E and F in the US military's phonetic alphabet of that time), also developed by Shaw.The JOSS system was brought up formally for the first time in May 1963, supporting five consoles, one in the machine room and another four in offices around the building.