JohN aNd MartiN. AN iNterpreted FORTH-like graphics laNguage by JohN WarNock aNd MartiNNewell, Xerox PARC, 1978. JaM was the foreruNNer of both INterpress aNd PostScript. It is meNtioNed iN PostScript LaNguage refereNce MaNual, Adobe Systems, A-W 1985.