ABC-NACO D(AS) General documents.

SUBSERIES 1 ABC-NACO D(AS) B-1 SUBSERIES 2 ACCIDENTS B-1 B-1 B-1 B-1 B-1 B-1 B-1 B-1 B-1 B-1 B-1 B-1 B-1 B-1 B-2 B-2 B-2 B-2 B-2 1840-1869. 1870-1879. 1880-1889. 1890-1899. 1900-1909. 1910-1919 1920-1929. 1930-1939. 1940-1949. 1950-1959. 1960-1969. 1970-1975. 1976-1979. 1980-1982. 1983. 1984. 1985. 1986. 1987. 1

B-2 B-2 B-2 B-2 B-2 B-2 B-2 B-2 B-2 B-3 B-3 B-3 B-3 B-3 B-3 1988. 1990. 1991. 1993. 1994. 1995. January, March-December, 1996. February, 1996. January-July, 1997. August-December, 1997. 1998. 1999. 2000. 2001. 2002-2004. SUBSERIES 3 AMERICAN RAILWAY ASSOCIATION B-3 Signal Division. B-3 B-3 B-3 Signal Section, 1920-1925. Signal Section, 1926-1929. Signal Section, 1930-1934. SUBSERIES 4 AMERICAN RAILWAY ENGINEERING ASSOCIATION B-4 Signals and Interlocking. 2

SUBSERIES 5 B-4 AMERICAN RAILWAY ENGINEERING AND MAINTENANCE OF WAY ASSOCIATION Signals and Interlocking. SUBSERIES 6 AMTRAK B-4 Timetables. SUBSERIES 7 ASSOCIATION OF AMERICAN RAILROADS Subsubseries 7.1 General documents B-4 1930-1989. B-4 1990-1999. B-4 2000-2002. Subsubseries 7.2 Communication and Signal Division B-4 General documents, 1980-1989. B-4 Newsletters. B-4 General documents, 1990-1995. Subsubseries 7.3 Communication and Signal Section B-5 1960-1969. B-5 1970-1979. B-5 1996-1997. B-5 Signal manual. Subsubseries 7.4 Signal Section B-5 1935-1949. B-5 1950-1960. 3

SUBSERIES 8 BANGOR AND AROOSTOOK. B-5 SUBSERIES 9 BIBLIOGRAPHY AND SOURCES B-5 1830-1960. B-5 1961-2004. SUBSERIES 10 BONDS B-5 B-5 Pictures (black and white photograph: "An 'ironless bond,' part of the Young System A-C Block Signaling, patents for which were acquired by the Pneumatic Signal Company, 1903"). B-5 Impedance. B-5 Propulsion. B-5 Rail. SUBSERIES 11 BROTHERHOOD OF RAILROAD SIGNALMEN B-5 1900-1919. B-5 1920-1929. B-5 1930-1939. B-5 1940-1949. B-5 1950-1959. B-5 1960-1969. B-5 1970-1975. B-5 1976. 4

B-5 1977-1978. B-5 1979 SUBSERIES 12 BURLINGTON NORTHERN AND SANTA FE RAILWAY B-6 B-6 B-6 B-6 Atchison, Topeka and Sante Fe. Burlington Northern. Chicago, Burlington and Quincy. Colorado and Southern, Fort Worth and Denver. B-6 Great Northern. B-6 Northern Pacific. B-6 St. Louis - San Francisco. SUBSERIES 13 CANADA B-6 Canada. SUBSERIES 14 CANADIAN NATIONAL B-6 B-6 B-6 B-6 B-6 B-6 Bessemer and Lake Erie. Central Vermont. Detroit and Toledo Shore Line. Detroit, Toledo and Ironton. Gulf, Mobile and Ohio. Illinois Central. SUBSERIES 15 CANADIAN PACIFIC B-6 5

B-6 B-6 B-6 Chicago, Milwaukee, St. Paul and Pacific. Delaware and Hudson. Soo Line. SUBSERIES 16 CARRIER SYSTEMS B-6 1940-1959. B-6 1960-1989. SUBSERIES 17 CHICAGO AND WESTERN INDIANA - BELT RAILWAY OF CHICAGO B-6 SUBSERIES 18 CHICAGO SIGNALING CLUB B-7 SUBSERIES 19 CIRCUIT CONTROLLERS B-7 SUBSERIES 20 B-7 B-7 Subsubseries 20.1 CODE CONTROL SYSTEMS Pictures (black and white photograph: "General Railway Signal Company Data Tran Test Set"). Union Switch and Signal I B-7 1930-1939. B-7 1940-1944. B-7 1945-1949. Subsubseries 20.2 General Railway Signal I 6

B-7 1950-1957. B-7 1958-1959. Subsubseries 20.3 Union Switch and Signal II B-7 1950-1955. B-8 1956-1959. Subsubseries 20.4 General Railway Signal II B-8 1960-1965. B-8 1966-1969. Subsubseries 20.5 Union Switch and Signal III B-8 1960-1969. Subsubseries 20.6 General Railway Signal III B-8 1970-1975. B-8 1976-1979. Subsubseries 20.7 Union Switch and Signal IV B-8 1970-1979. B-8 1980-1989. Subsubseries 20.8 General Railway Signal IV B-8 1980-1982, 1984. B-8 1983. B-9 1986. B-9 1988. B-9 January 1989. B-9 March-December 1989. 7

Subsubseries 20.9 Union Switch and Signal V B-9 1980-1984. B-9 1990-1999. SUBSERIES 21 COMMUNICATIONS B-9 B-9 1930-1969. B-9 1970-1988. B-9 1990. B-9 1991-1999. SUBSERIES 22 COMMUNICATIONS AND SIGNALS B-10 1946-1959. B-10 1960-1969. B-10 1970-1979. B-10 1980-1989. B-10 1990-1999. B-10 Railway Age Buyers Guides, 1990-2004. B-10 2000-2004. SUBSERIES 23 COMPUTERS B-10 1959-1969. B-10 1970-1979. B-10 1980-1989. B-10 1990-1993. 8

B-10 1994-1999. B-10 2000-2004. SUBSERIES 24 COMPUTERS, MICROPROCESSORS B-10 1970-1988. B-10 1989 B-10 1990-1999. SUBSERIES 25 CONRAIL B-11 1976-1989. B-11 1990-2000. B-11 Cleveland, Cincinnati, Chicago, and St. Louis. B-11 Lehigh Valley B-11 Michigan Central B-11 Monongahela B-11 B-11 B-11 New York Central, 1850-1909. New York Central, 1910-1999. New York, New Haven and Hartford. B-11 Pennsylvania I. B-11 Pennsylvania II. B-11 Pennsylvania III. B-11 Penn Central. SUBSERIES 26 CONSTRUCTION B-12 9

SUBSERIES 27 CONSULTANTS B-12 SUBSERIES 28 CONTROLLERS B-12 SUBSERIES 29 CORNING GLASS WORKS B-12 Corning Glass Works. SUBSERIES 30 CSX B-12 Atlantic Coast Line. Subsubseries 30.1 Baltimore and Ohio B-12 B-12 1910-1919. B-12 Baltimore and Ohio Centennial Exhibition, 1927. B-12 1950-1959. B-12 B-12 B-12 B-12 B-12 B-12 B-12 Buffalo, Rochester and Pittsburgh. Chesapeake and Ohio. Chicago, Indianapolis and Louisville. Clinchfield. Louisville and Nashville. Nashville, Chattanooga and St. Louis. Pere Marquette. 10

B-12 B-12 B-12 Pittsburgh and Lake Erie. Richmond, Fredericksburg and Potomac. Seaboard Air Line. SUBSERIES 31 DERAILS B-13 SUBSERIES 32 DESIGN: CIRCUITS AND SYSTEMS B-13 B-13 B-13 B-13 Communications and Signals, Association of American Railroads, Typical Signal Circuits Representing Current Practice, 1971. Fail Safe Circuits, 1987. Fail Safe Circuits, 1988. SUBSERIES 33 DETECTORS B-13 Pictures (black and white/color photographs). B-13 1883. B-13 1930-1979. B-13 1980-1989. B-13 1990-1999. B-13 2000-2004. B-13 B-13 B-13 B-13 Clearance (High-Wide Load). Communications. Dragging Equipment. High-Wide Load Dragging Equipment (color/black and white photographs and slides). 11

B-13 B-13 Flood, High Water. Ground. SUBSERIES 34 DETECTORS, HOT BEARING B-14 B-14 Pictures (black and white/color photographs and slides). B-14 1950-1959. B-14 1960-1964. B-14 1965-1969. B-14 1970-1974. B-14 1975-1979. B-14 1980-1981. B-15 B-15 General Railway Signal, 1982. Servo Corporation, 1982. B-15 1982-1984. B-15 1985-1987. B-15 1988-1989. B-15 1990-1994. B-15 2000-2004. B-15 B-15 B-15 Subsubseries 34.1 Tests of Hot Bearing Detectors, November 1988. Tests of Hot Bearing Detectors, Compatibility with Freight Car Trucks, 1988-1998. Communications and Signals, Mechanical Divisions, Association of American Railroads Ad Hoc Task Force on Hot Bearing Detectors (Freight Car Truck Compatibility), May 1986-1987. Freight Car Truck Compatibility 12

B-16 June-September 1987. B-16 Volume III, October 1987-April 1988. B-16 Volume IV, May-June 1988. B-16 Volume V, July-December 1988. B-16 Specification Test, 1989. B-16 Bearings, 1930-1939. B-16 Bearings, 1940-1949. B-16 Bearings, 1950-1959. B-16 Bearings, 1960-1974. B-16 Bearings, 1975-1989. B-16 Bearings, 1990-1999. B-16 Bearings, 2000-2004. B-16 Freight Car Trucks, general. Subsubseries 34.2 Car Presence B-16 1930-1979. B-16 1980-. B-16 B-16 Subsubseries 34.3 Slide Fence, Rock Fall. Trucks. Wheel Condition B-16 1950-1979. B-16 1980-1998. SUBSERIES 35 GEORGE B. DUTTON, JR., TRANSPORTATION CONSULTANT B-17 13

SUBSERIES 36 ECONOMICS B-17 1870-1949. B-17 1950-2004. SUBSERIES 37 T.A. EDISON COMPANY, MCGRAW-EDISON B-17 SUBSERIES 38 EDUCATION AND TRAINING B-17 1840-1899. B-17 1900-1969. B-17 Data Sheets, Communication and Testing, July 1962-July 1970. B-17 1970-1979. B-18 1980-1989. B-18 1990-1999. B-18 2000-2004. B-18 Signal Training Bulletins: The Signalman's Journal, 1978-1979. SUBSERIES 39 ELECTRIFICATION B-18 1930-1969. B-18 1970-1974. B-18 1975-1979. B-18 1980-1989. B-18 1990-2004. B-19 Transportation Research Board Committee A2MO2 (Electrification and Train Control Systems). 14

SUBSERIES 40 ELECTROMAGNETIC (COMPATIBILITY - ELECTROMAGNETIC INTERFERENCE) B-19 1906, 1957. B-19 1960-1969. B-19 1970-1979. B-19 1980-1082. B-19 1983. B-19 1984-1989. B-19 1990-1999. B-19 2000-2004. SUBSERIES 41 ELECTRONICS B-19 Electronics. SUBSERIES 42 ELGIN, JOLIET AND EASTERN B-19 SUBSERIES 43 ENVIRONMENT B-19 SUBSERIES 44 ENRICO B-19 Enrico. SUBSERIES 45 EXIDE, ELECTRIC STORAGE BATTERY COMPANY B-19 B-19 Exide Railway Products, 1987. 15

SUBSERIES 46 FEDERAL RAILROAD ADMINISTRATION B-20 1960-1969. B-20 1970-1979. B-20 1980-1985. B-20 1986-1989. B-20 1990-1994. B-20 Safety Laws and Regulations, 1994. B-20 1995-1996. B-20 1997-1999. B-20 2000-2004. Subsubseries 46.1 Railway Safety Advisory Committee B-20 1995-1999. B-20 2000-2004. SUBSERIES 47 FEDERAL SIGNAL COMPANY B-20 SUBSERIES 48 FLORIDA EAST COAST RAILROAD B-20 SUBSERIES 49 FOUNDATIONS B-20 1890-1989. B-20 1990-1999. B-20 2000-2005. 16

SUBSERIES 50 GENERAL ELECTRIC COMPANY B-20 SUBSERIES 51 GENERAL ELECTRIC TRANSPORTATION SYSTEMS B-20 Global Signaling. B-20 Subsubseries 51.1 General Electric Harris-Harmon Railway Technology. Harmon Industries B-20 Electronics, 1960-1979. B-20 1980-1989. B-21 1990-1999. B-21 2000. Subsubseries 51.2 Global Signaling B-21 Electro-Pneumatic Corporation. B-21 Seervo Corporation of America. SUBSERIES 52 GENERAL RAILWAY SIGNAL COMPANY ( ALSTOM SIGNALING) B-21 Predecessor Firms, 1899. B-21 1900-1909. B-21 1910-1919. B-21 1920-1929. B-21 1930-1939. B-21 1940-1949. B-21 1950-1959. 17

B-21 1960-1969. B-21 1970-1979. B-21 1980. B-21 1981-1982. B-21 1983-1989. B-21 1990-1993. B-21 1994-1999. B-21 Taylor Signal Company. B-21 2000-2004. SUBSERIES 53 GUILFORD TRANSPORTATION (BOSTON AND MAINE) B-21 SUBSERIES 54 HISTORY B-21 1894-1995. B-22 Subsubseries 54.1 American Railway Signaling Principles and Practices, Chapter One: November 1952. Railway Signaling and Communications B-22 1908-1975. B-22 Magazine Issues: May 1933, November 1950, April 1958, January 1970, April 1970, November-December 1973. B-22 Marketing. B-22 Signaling, History, 1860-2004. SUBSERIES 55 HOUSINGS, BUNGALOWS 18

B-22 Pictures (color photograph and slide: "Bungalow, September 1969, (instrument house) Baltimore and Ohio - Paul Brannen"). B-22 1871-1949. B-22 1950-1979. B-22 1980-2001. SUBSERIES 56 HUMAN FACTORS B-22 1870-1889. B-22 1900-1979. B-22 1980-2001. SUBSERIES 57 INDIANA HARBOR BELT B-22 SUBSERIES 58 INDICATORS B-22 SUBSERIES 59 INSTITUTE OF ELECTRICAL AND ELECTRONIC ENGINEERS B-22 B-22 SUBSERIES 60 Catalogues, 1999, 2000. Institute of Electrical and Electronic Engineers/American Society of Mechanical Engineers Joint Railroad Conference. INSULATED JOINTS B-22 1860-1939. B-22 1940-1969. B-22 1970-1989. B-22 1990-1999. 19

SUBSERIES 61 INTERSTATE COMMERCE COMMISSION B-22 1900-1929. B-22 1930-1939. B-23 1940-1949. B-23 1950-1959. B-23 1980-1999. B-23 B-23 Subsubseries 61.1 Block Signal and Train Control Board Reports, 1908-1912. Block Signal and Train Control Board, 1900-1919. Bureau of Safety B-23 1910-1919. B-23 1920-1929. B-23 1930-1939. B-23 1940-1949. B-23 1950-1959. B-23 1960-1969. SUBSERIES 62 J and A INDUSTRIES B-24 SUBSERIES 63 KANSAS CITY SOUTHERN B-24 SUBSERIES 64 KERITE COMPANY B-24 20

SUBSERIES 65 LABOR B-24 1890-1969. B-24 Presidential Emergency Board, No. 219, (1 May 1990). B-24 1970-2003. SUBSERIES 66 LAMPS B-24 Picture (black and white photograph: "Dr. H.P. Gage signing sample glasses of light and dark color limits selected by the American Association of Railroads Committee UI of signal section for Railroad use, 1953"). B-24 1850-1909. B-24 1910-1969. B-24 1970-2002. SUBSERIES 67 LENSES B-24 SUBSERIES 68 LEGISLATION, FEDERAL (UNITED STATES) B-24 1900-1979. B-24 1980-1999. SUBSERIES 69 LINE WIRE CONTROLS B-24 SUBSERIES 70 LOCKS, LOCKING B-24 Pictures (black and white/color photographs and slides). 21

B-24 Locking, general. B-24 Electric Locking. B-24 Mechanical Locking. SUBSERIES 71 LOCOMOTIVES B-24 SUBSERIES 72 L and W INDUSTRIES B-24 SUBSERIES 73 MAINTENANCE B-24 Pictures (black and white/color photographs and slides). B-25 1880-1899. B-25 1900-1919. B-25 1920-1949. B-25 1950-1969. B-25 1970-1979. B-25 1980-1989. B-25 1990-2004. B-25 SUBSERIES 74 C and S: Track American Railway Engineering and Maintenance of Way Association Seminar, September 10, 2000 MAINTENANCE OF WAY B-25 SUBSERIES 75 MILLER TRAIN CONTROL CORPORATION 22

B-25 SUBSERIES 76 MISCELLANEOUS B-25 1890-1999. B-25 2000-2005. SUBSERIES 77 MONITORS, EVENT RECORDERS B-25 1800-1989. SUBSERIES 78 NATIONAL TRANSPORTATION SAFETY BOARD B-25 1960-1999. B-25 2000-2004. SUBSERIES 79 NEW YORK, ONTARIO AND WESTERN B-25 SUBSERIES 80 NORFOLK SOUTHERN B-25 B-25 B-25 Central of Georgia. New York, Chicago, and St. Louis. Norfolk and Western B-25 Southern B-26 Virginian B-26 Wabash SUBSERIES 81 OKONITE COMPANY B-26 Okonite Company 23

SUBSERIES 82 PASSENGER OPERATIONS B-26 1920-1999. B-26 2000-2005. Subsubseries 82.1 Commuter Rail B-26 1950-1999. B-26 2000-2003. B-26 Accidents. B-26 Boston, Massachusetts (Massachusetts Bay Transit Authority). B-26 Chicago, Illinois (METRA). B-26 Los Angeles, California. B-26 Long Island Railroad. B-26 Long Island Railroad: Signal Engineering Operations. B-26 Metro North Railroad: New York City. B-26 New Jersey Transit: Central Railroad of New Jersey. B-26 New Jersey Transit: Delaware, Lackawanna and Western. B-26 New Jersey Transit: Erie, Erie-Lackawana. B-26 New Jersey Transit: New York and Long Branch. B-26 New Jersey Transit: Pennsylvania Reading Seashore Lines. B-26 New Jersey Transit: San Francisco, California. B-26 B-26 Southeastern Philadelphia, Pennsylvania Transport Authority. Southeastern Philadelphia, Pennsylvania Transport Authority: Reading. B-26 Washington, D.C. to Virginia, Maryland. 24

Subsubseries 82.2 Federal Transit Administration B-26 Subsubseries 82.3 High Speed Rail B-27 1930-1989. B-27 1990-1991. B-27 1992. B-27 1993. B-27 1994. B-27 1995-1996. B-27 1997. B-27 1998-1999. B-27 2000-2003. Subsubseries 82.4 Light Rail Transit B-27 Pictures (color photographs). B-27 1880-1899. B-27 1900-1909. B-27 1910-1919. B-27 1920-1989. B-27 1990-1993. B-27 1994-1997. B-27 1998. B-27 1999. B-27 2000-2009. 25

B-28 Accidents. B-28 Signaling. B-28 Baltimore, Maryland. B-28 Boston, Massachusetts. B-28 Buffalo, New York. B-28 Calgary, Alabama. B-28 Chicago, Illinois. B-28 Cleveland, Ohio. B-28 Dallas, Texas. B-28 Denver, Colorado. B-28 Edmonton, Alabama. B-28 Houston, Texas. B-28 Los Angeles, California. B-28 Newark, New Jerseys. B-28 New York, New York. B-28 Pittsburgh, Pennsylvania. B-28 Portland, Oregon. B-28 Sacramento, California. B-28 St. Louis, Missouri. B-28 Salt Lake City, Utah. B-28 San Diego, California. B-28 San Francisco-Oakland, California. B-28 Toronto, Ontario. 26

B-28 Vancouver, British Columbia. B-28 Washington, D.C. Subsubseries 82.5 B-28 Rail Transit Pictures (black and white/color photographs and slides). B-28 1900-1969. B-28 1970-1975. B-28 1976-1979. B-28 1980-1989. B-28 1990-1994. B-28 1995. B-28 1996-1997. B-29 1998-1999. B-29 2000-2004. B-29 Accidents, 1880-1989. B-29 Accidents, 1990-1999. B-29 American Public Transportation Association. B-29 Institute of Electrical and Electronics Engineers Standards. B-29 Signaling. B-29 Atlanta, Georgia. B-29 Atlanta, Georgia (Automatic Train Control, July 1985). B-29 B-29 Atlanta, Georgia (Audio Frequency Train Detection, August 1986). Atlanta, Georgia (Automatic Train Control, January 1988. 27

B-29 Baltimore, Maryland - Pictures (color photograph: "Maryland Transit Association, Baltimore, Maryland, June 1988"). B-29 Baltimore, Maryland. B-29 Baltimore, Maryland (Automatic Train Control, 1987). B-30 Baltimore, Maryland (Automatic Train Control, 1990). B-30 Bay Area Rapid Transit (BART), 1950-1969. B-30 Bay Area Rapid Transit (BART), 1970-1979. B-30 Bay Area Rapid Transit (BART), 1980 (Book: Divided Loyalty). B-30 Bay Area Rapid Transit (BART), 1980-1993. B-30 Bay Area Rapid Transit (BART), 1994-1999. B-30 Bay Area Rapid Transit (BART), 2000-2003. B-30 B-30 B-30 B-30 B-30 Bay Area Rapid Transit (BART), General Railway Signal Automatic Train Control, 1960s. Bay Area Rapid Transit (BART), General Railway Signal, Automatic Train Control. Bay Area Rapid Transit (BART), Union Switch and Signal, Automatic Train Control. Bay Area Rapid Transit (BART), Westinghouse Electric ATC. Boston, Massachusetts, pictures (black and white/color photographs and slides). B-30 Boston, Massachusetts. B-30 CA Westinghouse B-31 Chicago, Illinois, pictures (black and white/color photographs, 1966, 1969). B-31 Chicago, Illinois, 1950-2002. B-31 Cleveland, Ohio. B-31 Hudson and Manhattan (New Jersey - New York), pictures (black and white photograph, early 1900s). B-31 Los Angeles, California. 28

B-31 Miami, Florida. B-31 Montreal, Quebec B-31 New York City Transit Authority pictures (black and white photographs, 1950-1956). B-31 New York City Transit Authority, 1870-1899. B-31 New York City Transit Authority, 1900-1909. B-31 New York City Transit Authority, 1910-1929. B-31 New York City Transit Authority, 1920-1939. B-31 New York City Transit Authority, 1940-1949. B-31 New York City Transit Authority, 1950-1959. B-31 New York City Transit Authority, 1960-1962. B-31 New York City Transit Authority, 1963-1969. B-31 New York City Transit Authority, 1970-1979. B-31 New York City Transit Authority, 1980-1989. B-31 New York City Transit Authority, 1990-1996. B-31 New York City Transit Authority, 1997. B-31 New York City Transit Authority, 1998-2004. B-31 Delaware River Port Authority (PATCO), New Jersey - Pennsylvania. B-31 Port Authority Trans-Hudson (PATH). B-31 Staten Island Rapid Transit (SIRT). B-31 Toronto, Ontario Transit Commission, pictures (black and white photographs, 1966-1971). B-31 Toronto, Ontario Transit Commission. B-32 Washington, D.C., Maryland, Virginia (WMATA), pictures (black and white photographs). B-32 Washington, D.C., Maryland, Virginia (WMATA), 1969. 29

B-32 B-32 SUBSERIES 83 Washington, D.C., Maryland, Virginia (WMATA), 1970-1979. PATENTS, GENERAL Washington, D.C., Maryland, Virginia (WMATA), 1980-2004. B-32 B-32 Philadelphia Rapid Transit Company. SUBSERIES 84 PEOPLE B-32 B-32 Pictures (black and white photographs and slides: Charles C. Minot, Superintendent of Erie Railway; Wm Robinson, track circuit inventor; and Samuel Findley Breese Morse).. SUBSERIES 85 POLE LINES B-32 1870-1959. B-32 1960-2004. B-32 B-32 B-32 B-32 B-32 B-32 Manual Part 1-A-4, C and S, Association of American Railroads, 1997. Manual Part 1-A-6, C and S, Association of American Railroads, 1997. Manual Part 1-A-7 through 1-A-20, C and S, Association of American Railroads, 1997. Manual Part 1-A-24 through 1-A-75, C and S, Association of American Railroads, 1997. Manual Parts 1-B-1, 1-B-3, C and S, Association of American Railroads, 1997. Manual Parts 1-D-9, 1-E-1, 1-E-2, 1-E-10, C and S, 1997. SUBSERIES 86 B-32 POWER DISTRIBUTION AND SUPPLY Pictures (black and white photograph: Power Switchboards and Motor Generator Sets at an Interlocking station, 1950). 30

B-32 1900-1939. B-32 1940-1969. B-32 1970-1989. B-32 1990-2004. Subsubseries 86.1 Batteries B-32 Pictures (color photographs). B-32 Batteries, diagrams/black and white 1948. photographs, B-32 1880-1919. B-33 1920-1939. B-33 1940-1959. B-33 1960-1969. B-33 1970-1989. B-33 1990-1994. B-33 1995-1999. B-33 2000-2004. B-33 Chargers, diagrams/illustrations, 1948. B-33 Chargers, 1900-1979. B-33 Maintenance. B-33 Solar Power. SUBSERIES 87 QUEBEC, NORTH SHORE AND LABRADOR B-33 SUBSERIES 88 RADIO 31

B-33 1940-1969. B-33 1970-1989. B-33 1990-1995. B-33 1996-2003. Subsubseries 88.1 Federal Communications Commission B-34 December 1945, November 1994. B-34 November 6, 1992. B-34 July 19, 1995. SUBSERIES 89 RAILROAD SIGNAL INCORPORATED B-34 SUBSERIES 90 RAILS COMPANY B-34 SUBSERIES 91 RAILWAY SIGNAL ASSOCIATION B-34 1890-1909. B-34 1910-1911. B-34 1912-1914. B-34 1914-1919. SUBSERIES 92 RAILWAY SIGNALING CLUB B-34 1890-1899. B-34 1900-1902. B-34 1903-1909. 32

SUBSERIES 93 RAILWAY SYSTEM SUPPLIERS INCORPORATED B-34 1960-1989. B-34 1990-1995. B-34 1996-1999. B-34 2000-2004. B-34 Signal Appliance Association. SUBSERIES 94 RECTIFIERS B-34 1909-1929. B-34 1930-1939. B-34 1940-1949. B-34 1950-1959. B-34 1960-1999. SUBSERIES 95 RELAYS B-34 1900-1909. B-35 1910-1919. B-35 1920-1929 B-35 1930-1939. B-35 1940-1949. B-35 Alternating Current, Pictures (black and white photographs and illustrations, 1951). B-35 1950-1954. B-35 1955-1959. 33

B-35 1960-1969. B-35 1970-1979. B-35 1980-1984. B-35 1985-1989. B-35 1990-1994. B-35 1995-1999. B-35 2000-2003. SUBSERIES 96 RELAY TIMERS B-35 SUBSERIES 97 RELAY RACKS B-36 SUBSERIES 98 RESEARCH B-36 1920-1989. B-36 1990-1999. B-36 2000-2004. SUBSERIES 99 RESISTORS B-36 SUBSERIES 100 ROLLING STOCK B-36 SUBSERIES 101 SAFETRAN SYSTEMS CORPORATION 34

B-36 B-36 B-36 Subsubseries 101.1 Safetran Systems Corporation. Cheatham Electric Switching Device Company. Nachod and US Signal Company. Railroad Accessories Corporation B-36 B-36 Railroad Accessories Corporation, 1960s. B-36 Signal Accessories Corporation. SUBSERIES 102 SAFETY B-36 1840-1969. B-36 1970-1979. B-36 1980-1989. B-36 1990-1995. B-36 B-36 1996 (February United States House and Senate Hearings). 1996 (March United States House and Senate Hearings). B-36 1996-1999. B-37 2000-2003. SUBSERIES 103 SAXBY AND FARMER B-37 SUBSERIES 104 SCIENCE APPLICATIONS INTERNATIONAL CORPORATION B-37 SUBSERIES 105 SHOPS 35

B-37 General documents, 1920-1999. SUBSERIES 106 SIGNAL DEPARTMENTS (RAILROAD, INDIVIDUAL) B-37 SUBSERIES 107 SIGNAL HARDWARE B-37 General. B-37 Fasteners, Wires, Connectors. B-37 Mechanical. B-37 Terminals, General. B-37 Terminals, AMP. B-37 WAGO, 1995. SUBSERIES 108 SIGNAL STRUCTURES (BRIDGES, CANTILEVERS, MASTS, POSTS) B-37 General. SUBSERIES 109 SIGNAL TOWERS B-37 General. SUBSERIES 110 SIGNALING B-38 1850-1879. B-38 1880-1889. B-38 1890-1892. B-38 1893. B-38 1894-1895. 36

B-38 1896-1898. B-38 1899. B-38 1900-1905. B-38 1906-1909. B-38 1910-1919. B-38 1920-1923. B-38 1924-1929. B-38 1930-1939. B-38 1940-1943. B-38 1944-1946. B-38 1947-1949. B-39 1950-1959. B-39 1960-1969. B-39 1970-1976. B-39 1977-1979. Subsubseries 110.1 Federal Railroad Administration Study B-39 1978. B-39 1979. B-39 1980-1981. B-39 1980-1989. B-39 1990-1999. B-39 2000-2009. Subsubseries 110.2 Elements of Railway Signaling 37

B-40 Elements of Railway Signaling, 1954, 1979; Operations and Railway Signaling, 1953. Railway B-40 Elements of Railway Signaling, 1996. Subsubseries 110.2 B-40 Absolute Permissive Block Pictures (black and white photograph: "A 'meet' on the world's first installation of absolute permissive block signaling, Kinnear to Vinemount, Ontario, on the Toronto Hamilton and Buffalo Railway, 1911"). B-40 1910-1919. B-40 1920-1949. B-40 1950-1989. Subsubseries 110.3 Alternating Current. B-40 General. B-40 Subsubseries 110.4 B-40 1870-1889. B-40 1890-1899. B-40 1900-1904. B-40 1905-1907. B-40 1908-1909. B-40 1910-1914. B-40 1915-1919. B-40 1920-1925. B-41 1926-1929. B-41 1930-1939. B-41 1940-1945. "Alternating Current Signaling," by author McCready, Union Switch and Signal, 1915 (photocopy). Automatic Block Signaling. 38

B-41 1946-1949. B-41 1950-1959. B-41 1960-1999. Subsubseries 110.5 B-41 Block and Man Manual Block Pictures (black and white photograph: "Origin and first set of rules for Manual Block System," Union Switch and Signal Company). B-41 1860-1889. B-41 1890-1893. B-41 1894-1899. B-41 1900-1901. B-41 1902-1905. B-41 1906-1909. B-41 1910-1989. Subsubseries 110.6 Centralized Traffic Control B-41 Pictures (black and white/color photographs). B-41 Centralized Traffic Control Machine, pictures (black and white/color photographs). B-42 General. B-42 1920-1929. B-42 1930-1931. B-42 1932-1936. B-42 1937-1939. B-42 1940-1942. B-42 1943-1944. B-42 1945. 39

B-42 1946. B-42 1947. B-42 1948. B-42 1949. B-42 1950. B-42 1951. B-43 1952. B-43 1953. B-43 1954. B-43 1955. B-43 1956. B-43 1957. B-43 1958. B-43 1959. B-43 1960-1961. B-43 1962-1969. B-43 1970-1974. B-43 1975-1977. B-43 Union Pacific Consolidation, January 1978. B-44 1978-1979. B-44 1980-1982. B-44 1983-1989. B-44 1990-2004. 40

Subsubseries 110.7 Construction (Review and Outlook) B-44 1890-1919. B-44 1920-1924. B-44 1925-1929. B-44 1930-1939. B-44 1940-1949. B-44 1950-1959. B-44 1960-1969. B-44 1970-1979. Subsubseries 110.8 B-44 Interlockings Pictures (black and white/color photographs, photocopies of photographs, and illustrations). B-44 1850-1879. B-45 1880-1884. B-45 1885-1889. B-45 1890-1893. B-45 1894-1895. B-45 1896-1897. B-45 1898-1899. B-45 1900-1901. B-45 1902-1909. B-45 1910-1919. B-45 1920-1929. B-45 1930-1939. 41

B-45 1940-1944. B-45 1945-1949. B-45 1950-1952. B-45 1953-1959. B-45 1960-1989. B-45 1990-2002. Subsubseries 110.9 Automatic Interlockings B-45 1880-1939. B-45 1940-1989. Subsubseries 110.10 Bridge Interlockings B-46 Pictures (diagrams, 1868, 1882). B-46 1850-1899. B-46 1900-1989. B-46 1910-1914. B-46 1990-1996. B-46 1997-1999. B-46 2000-2002. B-46 2003-2004. Subsubseries 110.11 Electric Interlocking B-46 Pictures (black and white/color pictures and slides). B-46 1870-1899. B-46 1900-1905. B-46 1906-1909. 42

B-46 1915-1919. B-46 1920-1922. B-46 1923-1929. B-47 1930-1939. B-47 1940-1949. B-47 1950-1996. Subsubseries 110.12 Electro-Mechanical Interlocking B-47 1890-1926. B-47 1927-1969. Subsubseries 110.13 B-47 Electro-Pneumatic Interlocking Pictures (black and white/color photographs and diagrams). B-47 1880-1889. B-47 1890-1899. B-47 1900-1906. B-47 1907-1909. B-47 1910-1919. B-47 1920-1929. B-47 1930-1939. B-47 1940-1992. Subsubseries 110.14 Interlocking Maintenance B-48 General. Subsubseries 110.15 B-48 Mechanical Interlocking Pictures (black and white/color photographs and illustrations). 43

B-48 1875, 1880-1889. B-48 1890-1899. B-48 1900-1909. B-48 1910-1919. B-48 1920-1929. B-48 1930-1999. Subsubseries 110.16 Microprocessor Interlocking B-48 1960-1985. B-48 B-48 General Railway Signal Micro-processor Interlocks, Operations and Maintenance (1987). General Railway Signal Micro-processor Interlocks, User's Manual (1987). B-48 1986-1989. B-48 1990-1999. B-48 2000-2002. Subsubseries 110.17 B-49 Relay Interlocking Pictures (black and white photograph: "Relay Interlocking at Camden Station, Baltimore and Ohio, March 1963, Baltimore, Maryland"). B-49 1930-1949. B-49 1950-1969. B-49 Conrail CP (367 Rochester, NY), 1956, 1994. Subsubseries 110.18 Remote Control Interlockings B-49 1910-1929. B-49 1930-1989. B-49 Conrail CP 367 - Rochester, NY 44

Subsubseries 110.19 Signaling: Route Interlockings - Entrance/Exit B-50 Pictures (black and white photographs). B-50 1930-1939. B-50 1940-1949. B-50 1950-1959. B-50 1960-1979. B-50 1980-1999. Subsubseries 110.20 Rules, Standards, and Instructions (RS&I) B-50 Interstate Commerce Commission, 1930-1939. B-50 Interstate Commerce Commission, 1940-1949. B-50 Interstate Commerce Commission, 1950-1959. B-50 Interstate Commerce Commission, 1960-1965. B-50 B-50 Interstate Commerce Commission, January 24, 1966 "A" File. Interstate Commerce Commission, January 24, 1966 "B" File. B-50 Interstate Commerce Commission, 1966-1967. B-50 Federal Railroad Administration, 1969-1978. B-50 Federal Railroad Administration, 1979. B-51 B-51 B-51 B-51 Federal Railroad Administration, February 22-23, 1979 "A" File. Federal Railroad Administration, February 22-23, 1979 "B" File. Federal Railroad Administration, RS&I, Association of American Railroads, February 1979. Federal Railroad Administration, RS&I, TSJ (Brotherhood of Railroad Signalmen), February 1979 (Report in the Signalman's Journal). 45

B-51 Federal Railroad Administration, RS&I, 1980-1983. B-51 B-51 B-51 B-51 B-51 Federal Railroad Administration, RS&I, Association of American Railroads, 1980-1983. Federal Railroad Administration, RS&I, Association of American Railroads, 1981 "A" File. Federal Railroad Administration, RS&I, Association of American Railroads, 1981 "B" File. Federal Railroad Administration, RS&I, Association of American Railroads, 1981 "C" File. Federal Railroad Administration, 49 Code of Federal Regulations (photocopies), Parts 223, 235, 1981-1984. B-51 Federal Railroad Administration, RS&I, 1980-1983. B-51 Federal Railroad Administration, RS&I, 1981-1984 #1 File. B-51 Federal Railroad Administration, RS&I, 1982-1983 B-52 Federal Railroad Administration, RS&I, 1984 B-52 B-52 B-52 B-52 Federal Railroad Administration, RS&I, 1984 "A" File. Federal Railroad Administration, RS&I, 1984 "B" File. Federal Railroad Administration, RS&I, 1984 "C" File. Federal Railroad Administration, RS&I, 1984 "D" File. Notes Notes Notes Notes B-52 B-52 B-52 Federal Railroad Administration, RS&I, 49 Code of Federal Regulations (photocopies) Parts 236, 501+ "A" File (1982-1984). Federal Railroad Administration, RS&I, 49 Code of Federal Regulations (photocopies) Parts 236, 501+ "B" File (1982-1984). Federal Railroad Administration, RS&I, Technical Manuals 1995, 1997. 46

B-52 Federal Railroad Administration, RS&I, 49 Code of Federal Regulations (photocopies) Parts 233-236, 1988-2000. B-52 Federal Railroad Administration, RS&I, 1990-1999. B-52 Federal Railroad Administration, RS&I, 49 Code of Federal Regulations (photocopies) Parts 200-399 (1 October 2000). B-52 Federal Railroad Administration, RS&I, 2000-2009. B-52 B-53 B-53 B-53 B-53 Subsubseries 110.21 Federal Railroad Administration, Block Signal Applications, Waivers. Federal Railroad Administration, Processor Based Signal and Train Control, 2001 "A" File. Federal Railroad Administration, Processor Based Signal and Train Control, 2001 "B" File. Federal Railroad Administration, Processor Based Signal and Train Control, 2001 "C" File. Federal Railroad Administration, Processor Based Signal and Train Control, 2001 "D" File. In Service B-53 1880-1909. B-53 1910-1919. B-53 1920-1929. B-53 1930-1949. B-53 1950-1959. B-53 1960-1969. B-53 1970-1979. B-53 1980-1989. B-53 1990-1999. Subsubseries 110.22 Signal Units Joint Facilities 47

B-53 General. Subsubseries 110.23 State Regulations B-53 1850-1879. B-53 1880-1889. B-53 1890-1899. B-53 1900-1999. Subsubseries 110.24 Testing B-53 General. SUBSERIES 111 B-54 SIGNALS Pictures (black and white/color photographs, photocopies of photographs, and illustrations). B-54 1840-1879. B-54 1880-1889. B-54 1890-1899. B-54 1900-1909. B-54 1910-1939. B-54 1940-1949. B-54 1950-1989. B-54 1990-2002. Subsubseries 111.1 B-54 Aspects and Indications Pictures (color photograph and slide: "Train Operation, Signal Rules 281, 282, 285, 292"). B-54 1870-1899. B-54 1900-1919. B-54 1920-1939. 48

B-54 1940-1999. Subsubseries 111.2 Audible B-54 General, 1880-1899. Subsubseries 111.3 Automatic B-54 1870-1999. Subsubseries 111.4 B-55 Subsubseries 111.5 B-55 Ball Pictures (black and white/color photographs and illustrations). Colorlight Pictures (black and white/color photographs and illustrations). B-55 1854-1929. B-55 1930-1959. B-55 1960-1979. B-55 1980-1999. Subsubseries 111.6 B-55 Color-Position-Light Pictures (black and white/color photographs: "Association of American Railroads Signal Principle and Practices, 1949"). B-55 1920-2002. Subsubseries 111.7 B-55 Disc (Banjo) Pictures (black and white/color photographs and illustrations). B-55 1870-1959. Subsubseries 111.8 Distant B-55 1870-1920. Subsubseries 111.9 Dwarf 49

B-55 1890-1989. Subsubseries 111.10 False Proceed Failure Reports B-55 1900-1949. B-55 1950-1999. Subsubseries 111.11 Position Light B-55 Pictures (black and white/color photographs). B-55 1910-1939. B-55 1980-1999. Subsubseries 111.12 B-55 Searchlight Pictures (black and white/color photographs, slides, and illustrations). B-55 1900-1949. B-55 1950-1969. B-55 1970-1999. Subsubseries 111.13 B-55 B-56 Semaphore Pictures (black and white/color photographs, diagrams, and illustrations). Illustrations from American Railway Signaling Principles and Practices, 1930. B-56 1870-1889. B-56 1890-1899. B-56 1900-1909. B-56 1910-1919. B-56 1920-1929. B-56 1930-1949. B-56 1970-2004. 50

Subsubseries 111.14 Time B-56 1870-1899. Subsubseries 111.15 B-56 Train Order Pictures (black and white/color photographs and slides). B-56 1870-1939. Subsubseries 111.16 Tunnel B-56 1890-1909. SUBSERIES 112 SIGNS B-56 1880-1899. SUBSERIES 113 SOUTHERN SIGNAL COMPANY B-56 General. SUBSERIES 114 SUPPLIERS B-56 1880-1899. B-56 1900-2004. SUBSERIES 115 SUPPLIERS, COMMUNICATIONS AND SIGNAL EXHIBITIONS B-56 1880-1939. SUBSERIES 116 SURFACE TRANSPORTATION BOARD B-56 2000-2004. SUBSERIES 117 SURGE PROTECTION 51

B-56 Pictures (black and white photographs and illustrations: "Signal Power Transmission and Lighting Protection, 1959"). B-56 1880-1949. B-56 1950-1969. B-56 1970-1974. B-56 1975-1979. B-56 1980-1989. B-57 1990-1997. B-57 1998-1999. B-57 2000-2009. B-57 B-57 Arresters, 1900-1999. Grounding, 1910-1999. SUBSERIES 118 SWITCHES B-57 1830-1899. B-57 1900-2004. Subsubseries 118.1 Switch Circuit Controller B-57 Pictures (black and white photographs: "Number Seven Switch Circuit Controller, June 1953, Delaware and Hudson, Oneonta, New York, General Railway Signal). B-57 1910-2004. Subsubseries 118.2 Switches, Electric, Power B-57 Pictures (black and white diagrams and illustrations). B-57 1890-1949. 52

B-57 1950-1959. B-57 1960-1979. B-57 1980-1983. B-57 1984-1986. B-57 1987-1989. B-57 1990-1999. B-57 2000-2009. Subsubseries 118.3 Switches, Electro-Pneumatic B-57 Pictures (black and white photograph: "Hydro- Pneumatic Switch and Lock Movement at Bound Brook, New Jersey; installed 1883 at crossing of Philadelphia and Reading and Lehigh Valley Railroads"). B-57 1880-1939. B-57 1940-2004. Subsubseries 118.4 Switches, Facing Point Locks B-58 1880-1979. Subsubseries 118.5 Switches, Hand-Throw B-58 1840-2004. Subsubseries 118.6 Switches, Hardware B-58 1880-2004. Subsubseries 118.7 Switches, Heaters and Snow Removal 53

B-58 1880-2004. Subsubseries 118.8 Switches, Heaters, Air B-58 1950-2004. Subsubseries 118.9 Switches, Heaters, Electric B-58 1910-2004. Subsubseries 118.10 Switches, Heaters, Oil, Gas B-58 1900-2004. Subsubseries 118.11 Switches, Snow Detectors B-58 1952-2004. Subsubseries 118.12 Switches, Indicators B-58 1830-1999. Subsubseries 118.13 Switches, Lighting, Electric Lamps B-58 1890-1969. Subsubseries 118.14 Switches, Locking B-58 1870-2004. B-58 General Railway Signal, 1910-1999. B-58 Union Switch and Signal, 1920-1999 Subsubseries 118.14 Switches, Maintenance 54

B-58 1880-1999. Subsubseries 118.15 Switches, Spring B-58 Pictures (color photographs: "Spring Switch, Erie Lackawanna, Cortland, New York, July, 1973 - Paul Brannen"). B-58 1850-2004. SUBSERIES 119 TEST EQUIPMENT B-58 1910-1999. SUBSERIES 120 TESTS AND TESTING B-58 1900-1949. B-59 1950-1979. B-59 1980-1999. SUBSERIES 121 TIME RELEASE B-59 1909-2004. SUBSERIES 122 TRACK B-59 1840-1989. B-59 1990-1999. B-59 2000-2004. SUBSERIES 123 TRACK BUYER'S GUIDES B-59 2000-2001. B-59 2001-2005. 55

SUBSERIES 124 TRACK CIRCUITS B-59 Pictures (color diagrams). B-59 1870-1929. B-59 1930-1949. B-59 1950-1969. B-60 1970-1989. B-60 1990-2004. Subsubseries 124.1 Alternating Current B-60 1900-1999. B-60 Subsubseries 124.2 Alternating Current, 1951, pictures (photocopies of illustrations and diagrams). Alternating Current-Direct Current B-60 1980-1989. Subsubseries 124.3 Direct Current B-60 1870-1999. B-60 Union Switch and Signal, 1949. B-60 Invention of DC Track Circuit, 1872. Subsubseries 124.4 Coded B-60 1930-1939. B-60 General Railway Signal, 1930-1949. B-60 General Railway Signal, 1950-1969. B-60 General Railway Signal, Trakode II, 1970-1989. B-60 General Railway Signal, Gerakode, 1980-1989. B-60 General Railway Signal, 1990-2004. 56

Subsubseries 124.5 Coded Harmon B-60 1970-1979. B-61 1980-1989. B-61 1990-2004. Subsubseries 124.6 Coded Safetran B-61 1970-1999. Subsubseries 124.7 Coded Union Switch and Signal B-61 1930-1979. B-61 September 1942. B-61 June 1985. B-61 1980-2004. Subsubseries 124.8 Hardware B-61 1930-1999. Subsubseries 124.9 High Frequency B-61 1960-1989. Subsubseries 124.10 Overlay (Audio Frequency) B-61 1950-1969. B-61 1970-1978. B-61 1979. B-61 Union Switch and Signal, 1972-1984. B-62 1980-1984. B-62 1985-1989. Subsubseries 124.11 Phase Selective 57

B-62 1966-1999. Subsubseries 124.12 Type C B-62 1970-1989. Subsubseries 124.13 Testing B-62 1920-1999. SUBSERIES 125 TRACK MOTOR CARS B-62 1880-1992. SUBSERIES 126 TRAIN CONTROL B-62 1880-1990. Subsubseries 126.1 Advanced Train Control System B-62 1984. B-62 January-August, 1985. B-62 September-December, 1985. B-62 January-March, 1986. B-62 April-December, 1986. B-62 January-June, 1987. B-62 July-December, 1987. B-62 January-March, 1988. B-62 April-December, 1988. B-62 January-March, 1988. B-62 April-December, 1988. B-62 January-March, 1989. 58

B-62 April-December, 1989. B-63 January-June, 1990. B-63 July-December, 1990. B-63 January-March, 1991. B-63 May-June, 1991. B-63 August-December, 1991. B-63 1992. B-63 1993. B-63 B-63 Component Specification Drafting Committee, September 27, 1993 ("A" File). Component Specification Drafting Committee, September 27, 1993 ("B" File). B-63 1994 B-63 1995-2001. B-63 Control Flows "A" File. B-63 Control Flows "B" File. B-63 Control Flows "C" File. B-63 Control Flows "D" File. B-64 Control Flows "E" File. B-64 Control Flows "F" File. B-64 B-64 B-64 Federal Railroad Administration Rules, Standards, and Instructions "A" File. Federal Railroad Administration Rules, Standards, and Instructions "B" File. Federal Railroad Administration Rules, Standards, and Instructions "C" File. B-64 Specifications, 100, 110, 130. 59

B-64 Specifications, 140,160. B-64 Specifications, 200 "A" File. B-64 Specifications, 200 "B" File. B-64 Specifications, 200 "C" File. B-64 Specifications, 200 "D" File. B-64 Specifications, 210, 220, 225. B-64 Specifications, 250 "A" File. B-64 Specifications, 250 "B" File. B-64 Specifications, 250 "C" File. B-64 Specifications, 300, 310, 311, 320, 335. B-65 Specifications, 400. B-65 Specifications, 500, 530. B-65 Specifications, 600, 610, 620. B-65 Specifications, 700. B-65 Specifications, 800. Subsubseries 126.2 Automatic Train Control B-65 1870-1909. B-65 1910-1919. B-65 1920-1921. B-65 1922. B-65 Interstate Commerce Commission, 1920-1922. B-65 American Railway Association, 1921-1922. B-65 1923. 60

B-65 1924. B-65 Interstate Commerce Commission, 1923-1924. B-66 1925. B-66 American Railway Association, May 1925. B-66 American Railway Association, June 1925. B-66 American Railway Association, July 1925. B-66 American Railway Association, August 1925. B-66 American Railway Association, September- 1925. October B-66 American Railway Association, November 1925. B-66 American Railway Association, December 1925. B-66 Interstate Commerce Commission, American Railway Association, 1925. B-66 Interstate Commerce Commission, 1925-1926. B-66 1926. B-66 Interstate Commerce Commission, American Railway Association, January 1926. B-66 American Railway Association, January 1926. B-67 American Railway Association, February 1926. B-67 American Railway Association, March 1926. B-67 American Railway Association, April 1926. B-67 B-67 Interstate Commerce Commission, American Railway Association, April 1926. Interstate Commerce Commission, American Railway Association, May 1926. B-67 American Railway Association, May-June 1926. B-67 American Railway Association, July 1926. B-67 Interstate Commerce Commission, American Railway Association, July 1926. 61

B-67 B-67 B-67 American Railway Association, August- 1926. September Interstate Commerce Commission, American Railway Association, August 1926. Interstate Commerce Commission, American Railway Association, October 1926. B-67 American Railway Association, November 1926. B-67 Interstate Commerce Commission, American Railway Association, November 1926. B-67 American Railway Association, December 1926. B-67 1927. B-68 1928. B-68 Interstate Commerce Commission, 1927-1929. B-68 1929. B-68 B-68 Book: Reports/Orders of the Interstate Commerce Commission: In the Matter of Automatic Train Control Device: Docket# 13413, 1931 (Removed to John W. Barriger III National Railroad Library). Book: Automatic Train Control: Early Development, Tests, Types of Devices, Interstate Commerce Commission Orders and Present Situation: Bulletin of Committee on Automatic Train Control, American Railway Association, November 1930 (Bulletins 1-9) (Removed to John W. Barriger III National Railroad Library). B-68 1930-1939. B-68 Interstate Commerce Commission, 1930-1939. B-68 1940-1949. B-68 Interstate Commerce Commission, 1940-1949. B-68 1950-1959. B-68 Interstate Commerce Commission, 1950-1959. 62

B-68 1960-1969. B-68 1970-1979. B-68 1980-1989. B-68 1990-1999 B-68 Maintenance. Subsubseries 126.3 B-69 Automatic Train Operation Pictures (black and white/color photographs and slides). B-69 1950-1959. B-69 1960-1969. B-69 1970-1979. B-69 1980-1989. Subsubseries 126.4 B-69 Automatic Train Stop Pictures (black and white/color photographs and slides). B-69 1880-1899. B-69 1900-1909. B-69 1910-1919. B-69 Interstate Commerce Commission, 1910-1919. B-69 1920-1929. B-69 Interstate Commerce Commission, 1920-1929. B-69 1930-1939. B-69 Interstate Commerce Commission, 1930-1939. B-69 1940-1949. B-69 Interstate Commerce Commission, 1940-1949. 63

B-69 1950-1959. B-69 Interstate Commerce Commission, 1950-1959. B-69 Federal Railroad Administration, 1970-1979. B-69 1980-1999. Subsubseries 126.5 B-69 Cab Signals Pictures (black and white/color photographs and diagrams). B-69 1860-1899. B-69 1900-1929. B-69 Interstate Commerce Commission, 1920-1929. B-69 1930-1939. B-69 Interstate Commerce Commission, 1930-1939. B-69 1940-1949. B-69 Interstate Commerce Commission, 1940-1949. B-69 1950-1959. B-70 Patents, 1953. B-70 Interstate Commerce Commission, 1950-1959. B-70 1960-1969. B-70 1970-1979. B-70 1980-1981. B-70 1982. B-70 1983. B-70 1984-1988. B-70 1989. 64

B-70 1990-1999. B-70 2000-2003. Subsubseries 126.6 Positive Train Control (also titled "Communications Based Train Control, Electronic Train Management System, Positive Train Stop or Transmission Based Signaling"). B-70 1994. B-70 1995. B-71 May 9-10, 1995. B-71 November 13, 1995. B-71 November 14, 1995. B-71 1996. B-71 1997-1998. B-71 1999. B-71 2000-2006. B-71 Alaska Railroad. B-71 Amtrak Northeast Corridor, 1970-1979. B-71 Amtrak Northeast Corridor, 1980-1989. B-71 Amtrak Northeast Corridor, 1990-1999. B-71 Amtrak Northeast Corridor, 2000-2004. B-71 B-71 B-72 B-72 Amtrak Michigan (Also called "Amtrak Incremental Train Control in Michigan"), 1990-1999. Amtrak Michigan, (Also called "Amtrak Incremental Train Control in Michigan"), 2000-2004 Burlington Northern Advanced Railroad Electronics System (ARES), 1980-1989. Burlington Northern Advanced Railroad Electronics System, 1990-1999. 65

B-72 B-72 B-72 B-72 B-72 B-72 B-72 B-72 B-72 Burlington Northern and Sante Fe, Electronic Train Management System, 2002-2003. Burlington Northern and Sante Fe, Electronic Train Management System, 2003-2004. Burlington Northern-Union Pacific Tests, June 1994- June 1995. Burlington Northern-Union Pacific Tests, System Requirements, June 1995. Burlington Northern-Union Pacific Tests, Federal Railroad Administration, July 1995. Burlington Northern-Union Pacific, Product Specification, August 1995. Burlington Northern-Union Pacific Tests, September, November 1995. Burlington Northern-Union Pacific Tests, January- March 1996. Burlington Northern-Union Pacific Tests, April- December 1996. B-72 Burlington Northern-Union Pacific, 1997. B-72 CSX Transportation - Communications Based B-72 B-72 B-72 B-72 B-72 B-72 B-72 B-72 B-73 CSX Transportation - Communications Based, Train Management. Federal Railroad Administration, 5-7 May 1998, General "A" File. Federal Railroad Administration, 5-7 May 1998, Costs/Benefits "B" File. Federal Railroad Administration, 5-7 May 1998, Regulations "C" File. Federal Railroad Administration, 5-7 May 1998, Railroad Communications and Train Control, "D" File. Federal Railroad Administration, 5-7 May 1998, Safety "E" File. Federal Railroad Administration, 5-7 May 1998, Safety "F" File. Federal Railroad Administration, 5-7 May 1998, Human Factors "G" File. Federal Railroad Administration, 5-7 May 1998, Europe "H" File. 66

B-73 B-73 B-73 B-73 North American Joint Positive Train Control Program, 1998-1999. North American Joint Positive Train Control Program, January 2000 "A" File. North American Joint Positive Train Control, January 2000 "B" File. North American Joint Positive Train Control, March- December 2000. B-73 North American Joint Positive Train Control, 2001. B-73 North American Joint Positive Train Control, 2002. B-73 B-73 SUBSERIES 127 TRAIN OPERATIONS North American Joint Positive Train Control, 2003-2006. Transportation Research Board: Committee A2MO2 Electrification and Train Control for Guided Ground Transportation Systems. B-73 1840-1899. B-73 1900-1919. B-73 1920-1949. B-73 1950-1959. B-73 1960-1989. B-73 1990-1993. B-73 1994-1995. B-73 1996-1999. B-73 2000-2005. B-74 Subsubseries 127.1 Let's Operate a Railroad by L. E. Roxbury, High Iron Publishers, Warwick, VA, 1957 (photocopy of book). Dispatching B-74 1870-1979. 67

B-74 1980-1999. B-74 2000-2003. Subsubseries 127.2 Dispatching, Computer Aided B-74 1950-1979. B-74 1980-1985. B-74 1986-1989. B-74 1990-1994. B-74 1995-1999. B-74 2000-2004. Subsubseries 127.3 Operating Rules B-74 1880-1899. B-74 1900-1929. B-74 B-74 B-74 B-74 B-75 Association of American Railroads: Standard Code of Operating Rules (January 1964, January 1986, January 1993). Association of American Railroads: Standard Code of Operating Rules (November 1938 "A" File). Association of American Railroads: Standard Code of Operating Rules (November 1938 "B" File). Association of American Railroads: Standard Code of Operating Rules, 1930-1949. Association of American Railroads: Standard Code of Operating Rules, 1960-1999. B-75 Amtrak, Chicago (April 1972, September 1993). B-75 Chessie System, Conrail (January, September 1985). B-75 Subsubseries 127.4 Norac (East), Code of the West (October 1952, April/October 1985, January 1992, January 1998). By Signal Indications B-75 1900-1919. 68

B-75 1920-1929. B-75 1930-1959. Subsubseries 127.5 Telegraph B-75 1830-1899. B-75 1900-1999. Subsubseries 127.6 Telephone B-75 1890-1999. Subsubseries 127.7 Time B-75 1850-2004. Subsubseries 127.8 Timetables, Employee B-75 1940-1949. B-75 1960-1969. B-75 1970-1979. B-75 1980-1984. B-75 1985-1989. B-75 1990-1999. Subsubseries 127.9 Timetables and Train Orders B-75 1920-1999. Subsubseries 127.10 Train Order System B-75 Train Order Patent (information: 1907, 1908). Subsubseries 127.11 Train Staff B-75 1880-1899. B-76 1900-1939. 69

SUBSERIES 128 TRANSFORMERS B-76 Pictures (black and white illustrations). B-76 1910-1999. SUBSERIES 129 UNION PACIFIC B-76 1900-2004. B-76 B-76 B-76 B-76 B-76 B-76 B-76 B-76 B-76 B-76 Chicago and Alton. Chicago and North Western. Chicago Great Western. Chicago, Rock Island and Pacific. Denver and Rio Grade Western. Missouri-Kansas-Texas. Missouri Pacific. Southern Pacific. Texas and Pacific. Western Pacific. SUBSERIES 130 UNION SWITCH AND SIGNAL COMPANY B-76 1880-1889. B-76 1880-1899 (Removed from folder: "A Catalogue of the Devices and their Parts. Manufactured by the Union Switch and Signal Company, 1894 -cataloged in John W. Barriger III National Railroad Library as rare book TF640.U64C28 1894). B-76 1900-1909. B-76 1910-1919. 70

B-76 1920-1929. B-76 George Westinghouse, 1921. B-76 1930-1939. B-76 1940-1949. B-76 B-77 B-77 B-77 B-77 B-77 B-77 B-77 B-77 B-77 B-77 B-77 B-77 B-77 B-77 B-77 Subsubseries 130.1 Patents, 1944-1949. History, 1882, Volume IA. History, 1891, Volume IB. History, 1926, Volume IC. History, Volume II Appendix (related domestic companies, 1882-1948). Patents, 1950-1954. 1950-1959 (general Union Switch and Signal). History of Union Switch and Signal, May 1950. 1960-1969 (general). 1970-1979 (general). 1980-1989 (general). Book: The Search for Safety: A history of Railroad Signals and the People who made them. Commissioned by Union Switch and Signal Division. American Standard, Inc. (removed to John W. Barriger III National Railroad Library - catalogued as book TF615.B74 1981). 1990-1999 (general). 1991 Price List. 1995 Price List. 2000-2004 (general). Companies B-77 Hall Signal Company, 1870-1899. 71

B-77 Hall Signal Company, 1900-1935. B-77 Johnson Railroad Signal Company, 1880-1929. B-78 Johnson Railroad Signal Company: Catalogue of Interlocking and Railroad Signaling Appliances, 1889. B-78 National Switch and Signal Company, 1890-1899. B-78 Transcontrol, 1950-1989. SUBSERIES 131 UNITED STATES RAILROAD ADMINISTRATION B-78 1910-1929. SUBSERIES 132 WATERBURY BATTERY COMPANY B-78 1920-1929. SUBSERIES 133 WESTERN-CULLEN-HAYES B-78 B-78 Chicago Railway Signal and Supply Company, 1890-1989. Chicago Railway Signal and Supply Company, 1914. SUBSERIES 134 WIRE AND CABLE B-78 1880-1929. B-78 1930-1959. B-78 1960-1989. B-78 1990-1999. B-78 2000-2002. B-78 Testing. SUBSERIES 135 YARDS 72

B-78 Pictures (black and white/color photographs and slides). B-78 1880-1899. B-78 1900-1919. B-78 1920-1929. B-78 1930-1939. B-78 1940-1946. B-78 1947-1949. B-79 1950-1951. B-79 1952. B-79 1953. B-79 1954. B-79 1955. B-79 1956. B-79 1957. B-79 1958. B-79 1959. B-79 1959, St. Louis Southwestern Yards. B-79 1960-1961. B-79 1962-1964. B-79 1965-1966. B-79 1967-1969. B-79 Penn Central (Elkhart, IN): General Railway Signal Company Class-Matic Mark II Maintenance, Alfred E. Perlman Yard (Selkirk, NY), June 1968. B-79 1970-1971. 73

B-79 Penn Central, Buckeye Yard (Columbus, OH): General Railway Signal Company Class-Matic Mark II Maintenance, November 1971. B-80 1972-1974. B-80 1975-1978. B-80 1979. B-80 B-80 B-80 Canadian Pacific Rail: St. Luc Yard (Montreal, Quebec), 1979 (General Railway Signal Company Operating Instructions for Hump Conductor). Conrail DeWitt (Syracuse, NY), August 1980 - "A" File (General Railway Signal Company). Conrail DeWitt (Syracuse, NY), August 1980 - "B" File (General Railway Signal Company). B-80 1980-1981. B-80 Chesapeake and Ohio, Queensgate (Cincinnati, Ohio), September, 1982 (Union Switch and Signal). B-80 1982-1989. B-80 South Pacific Englewood Yard (Houston, TX), Union Switch and Signal, January 1984, October 1985. B-80 1990-1999. B-80 2000-2004. B-80 Subsubseries 135.1 B-81 Maintenance, 1950-1989. Retarders Pictures (black and white/color photographs and slides). B-81 1920-1929. B-81 1930-1939. B-81 1940-1949. B-81 1950-1959, "A" File. B-81 1950-1959, "B" File. B-81 1960-1969. 74