The engine that could; a tenuous venture, 1919-1929; gaining a foothold, 1930-1939; investors and inventors, 1941-1946; becoming a big business, 1947-1958; the go-go decade, 1960-1969; the world changes, 1969-1975; playing by the new rules, 1973-1978; betting the company, 1979-1985; Cummins versus Japan, 1984-1987; circling the wagons; pressures and profits, 1988-1994; Cummins and the American century.