Contains data on every PRR freight car used in interchange from 1927 to 1950. This disk contains the following ORER issues: 12-1927, 8-1928, 11-1929, 2-1930, 7-1931, 6-1932, 7-1933, 7-1934, 7-1935, 7-1936, 10-1937, 10-1938, 1-1939, 1-1940, 4-1941, 1-1942, 4-1943, 7-1944, 1-1945, 1-1946, 10-1947, 1-1948, 10-1949, 7-1950.