Contains data on every PRR freight car used in interchange from 1951 to 1968. Also includes PRR lettered cars running under PC and CR. This disk inlcudes the following ORER issues: 10-1951, 4-1952, 10-1953, 1-1954, 1-1955, 7-1956, 1-1957, 1-1958, 1-1959, 1-1960, 4-1961, 7-1962, 1-1963, 4-1964, 1-1965, 1-1966, 1-1967, 4-1968. The following ORER issues are for PC/CONRAIL: 10-1970, 11-1973, 10-1976, 7-1979, 10-1984.