| B | Bamberger R.R. | 1/52-7/65 |
| B&A | Boston & Albany R.R. | 7/23-10/66 |
| BA | Penn Central Transportation Co. | Jan-75 |
| Penn Central Transportation Co., Robert W. Blanchette, Richard C. Bond and John H. McArthur, Trustees | eliminated 4/76 | |
| Consolidated Rail Corp. | added 4/76; 1/80-1/94; eliminated 7/99 | |
| BACX | C.A. Burnette Co, Inc. | Apr-38 |
| BADX | W.A. Baden | added 7/64; eliminated 1/65 |
| Baden Tank Car Co. | added 1/65; 7/65; eliminated 1/66 | |
| W.A. Baden | added 4/69; 4/70-1/75 | |
| Baden Investment Co. | 1/80-7/2000 | |
| BAEX | Farmers Elevator Co. of Bondurant, IA | added 10/83; eliminated 4/91 |
| The Andersons | added 4/95; 7/2000 | |
| BAGX | Bloch & Guggenheimer, Inc. | 4/38-4/61; eliminated 4/62 |
| Bags, Inc. | added 4/85; eliminated 1/89 | |
| BAKX | Belle Alkali Co. | 4/38-1/52 |
| Baker Commodities, Inc. | added 1/66; 10/66; eliminated 4/68; 4/70-1/80 | |
| BAOX | British American Oil Co. | 4/38-10/57 |
| Canadian General Transit Co., Ltd. | 4/61; eliminated 4/61 | |
| BA&P | Butte, Anaconda & Pacific Ry. | 23-Jul |
| BAP | Butte, Anaconda & Pacific Ry. | 4/38-10/66 & 1/75-1/80 |
| BAR | Bangor and Aroostook R.R. Co. | 7/23-7/2000 |
| BASX | Bay State Milling Co. | added 1/81; eliminated 10/93; 1/94; added 10/96; eliminated 4/97; 7/2000 |
| BAWX | The Babcock & Wilcox Co. | added 4/69; 4/70-7/2000 |
| BAX | The Barber Co., Inc. | Apr-38 |
| BAYL | The Bay Line R.R., L.L.C. | added 4/94; 7/2000 |
| BAYX | Bay Chemical Co., Division of Morton Salt Co. | 1/52-10/57 |
| Morton Chemical Co. | eliminated 1/59 | |
| Mobay Chemical Co. | added 7/74; 1/75; eliminated 1/78 | |
| Mobay Chemical Corp. | added 1/78; 1/80 | |
| Union Tank Car Co. | Jan-94 | |
| Bayer Corp. | added 4/96; 7/2000 | |
| BAZX | Bay Chemical Co., Inc. | added 4/73; 1/75-1/80; eliminated 1/86 |
| Bay Zinc Co., Inc. | added 1/86; eliminated 7/87 | |
| BB | Buckingham Branch R.R. Co. | added 7/89; 1/94-7/2000 |
| BBBX | B.B. Blair Co. | eliminated 7/65 |
| B.B. Blair | added 7/65; 7/65; eliminated 1/66 | |
| BBCX | Brown Boveri Corp. | added 11/73; 1/75-1/80; eliminated 4/84 |
| BBC Brown Boveri, Inc. | added 4/84; eliminated 1/89 | |
| ABB Brown Boveri Power Equipment, Inc. | added 1/89; eliminated 1/90 | |
| ABB Brown Boveri Power Generation, Inc. | added 1/90; eliminated 4/90 | |
| ABB Steam Power Generation Co. | added 4/90; eliminated 4/92 | |
| ABB Power Generation, Inc. | added 4/92; 1/94-7/2000 | |
| BBPX | North American Car Corp. | added 4/65; 7/65-4/70; eliminated 7/73 |
| BBRX | Bombardier Inc., Transportation Equipment Group | added 10/96; 7/2000 |
| BBS | The Bloomsburg and Sullivan R.R. Co. | 23-Jul |
| BBSX | Bradford Gasoline Co. | Apr-38 |
| BBWX | Bisceglia Brothers, Inc. | Apr-38 |
| B&C | Barre & Chelsea R.R. Co. | 23-Jul |
| BC | Barre & Chelsea R.R. | 4/38-1/52 |
| BCA | Baltimore, Chesapeake & Atlantic Ry. Co. | 23-Jul |
| BCAX | Blue Circle Atlantic, Inc. | added 4/87; eliminated 7/88 |
| Blue Circle Atlantic, Inc., d/b/a Blue Cirle West | added 7/88; eliminated 4/89 | |
| Blue Circle Atlantic, Inc. | added 4/89; eliminated 10/90 | |
| Blue Circle Inc. | added 10/90; 1/94-7/2000 | |
| BCBX | B. Cribari & Sons | Apr-38 |
| BCCX | Border Chemical Co., Ltd. | added 7/65; 7/65-7/2000 |
| BCDX | The Borden Co., Chemical Division | 10/57; eliminated 10/60 |
| Borden Chemical Co., Division of the Borden Co. | added 10/60; 4/61-10/66; eliminated 7/68 | |
| Borden, Inc. -- Chemical Division | added 7/68; 4/70; eliminated 1/72 | |
| Borden Chemical, Division of Borden, Inc. | added 1/72; 1/75; eliminated 7/76; added 7/78; 1/80; eliminated 1/91 | |
| Borden Packaging & Industrial Products, Division of Borden, Inc. | 7/2000; eliminated 1/2001 | |
| Borden Chemical, Inc. | added 1/2001 | |
| BCE | British Columbia Hydro and Power Authority | 1/75-1/80 |
| BCFX | North American Car Corp. | added 1/74; 1/75-1/80 |
| General Electric Railcar Services Corp. | eliminated 7/93; 1/94 | |
| BCGX | Bay Cities Gas Corp. | added 4/85; 1/94; eliminated 1/99; 7/2000 |
| BCH | British Columbia Hydro and Power Authority | 1/75-1/80; eliminated 1/89 |
| Southern Ry. of British Columbia Ltd. | added 1/89; eliminated 10/92; 1/94-7/2000 | |
| BCIT | British Columbia Ry. Co. | 1/75-1/80; eliminated 10/84 |
| BC Rail Ltd. | added 10/84; 1/94-7/2000 | |
| BCIX | Blue Circle Inc. | added 4/87; 1/94-7/2000 |
| BCK | Buffalo Creek R.R. | 7/23-10/66 & 1/75 |
| Consolidated Rail Corp. | 1/80-1/94; eliminated 7/99 | |
| BCLR | Bay Colony R.R. Corp. | added 10/82; 1/94-7/2000 |
| BCMX | Bullet Concrete Materials Co. | added 5/83; eliminated 10/87; 1/94-7/2000 |
| BCNE | Canadian National Ry.s | 1/94-7/2000 |
| BCOL | British Columbia Ry. Co. | 1/75-1/80; eliminated 10/84 |
| BC Rail Ltd. | added 10/84; 1/94-7/2000 | |
| BCOX | Baker Castor Oil Co. (General American Transportation Corp.) | Apr-38 |
| Baker Castor Oil Co. | 1/52-7/65 | |
| Baker Castor Oil Co. (General American Transportation Corp.) | Oct-66 | |
| Baker Castor Oil Co. | 4/70-1/80 | |
| BCPX | Brighton Corp. | added 7/81; eliminated 10/91 |
| BCRR | Boyne City R.R. Co. | 1/75-1/80 |
| BCRX | Brookhaven Creamery Co., Inc. | Apr-38 |
| Brae Transportation Inc., a subsidiary of Brae Corp. | added 4/88; eliminated 1/90 | |
| General Electric Railcar Services Corp. | added 1/90; 1/94; eliminated 1/2000 | |
| General Electric Rail Services Corp. | added 1/2000; 7/2000 | |
| BCRY | Cando Contracting Ltd., d/b/a Barrie-Collingwood Ry. | Jul-00 |
| BCTX | The Blanton Co. | Apr-38 |
| Boise Cascade Corp. | added 10/68; 4/70; eliminated 4/72 | |
| Boise Cascade Corp. (Intra-Plant Service) | Jan-94 | |
| BCVX | West Coast Express | Jul-00 |
| B&CW | Bennetsville & Cheraw R.R. Co. | 7/23-4/38 |
| BCWX | Union Tank Car Co. | added 4/75; 1/80-7/2000 |
| BCX | Brown Co. | 4/38-10/66; eliminated 10/67 |
| BDCX | Diamond Bathurst, Inc. | eliminated 10/89 |
| Anchor Glass Container | added 10/89; 1/94; eliminated 10/95; 7/2000 | |
| BDLX | BDL Co. | Jul-00 |
| BDMX | Blue Diamond Mining, Inc. | added 10/78; 1/80; eliminated 1/89; 1/94-7/2000 |
| BDNX | Baroid Division, National Lead Co. | added 10/65; 10/66-4/70; eliminated 4/73 |
| Baroid Division, NL Industries, Inc. | added 4/73; 1/75-1/80; eliminated 10/89 | |
| Baroid Drilling Fluids, Inc. | added 10/89; 1/94-7/2000 | |
| BDRY | Belvidere & Delaware River Ry. co., Inc. | Jul-00 |
| BDS | Bois D'Arc & Southern Ry. | Jan-52 |
| BDTL | Ballard Terminal R.R. Co. LLC | Jul-00 |
| BDW | Bad Water Line | added 1/89; eliminated 7/92; 1/94; added 1/99; 7/2000 |
| BE | Bamberger Electric R.R. | Apr-38 |
| Baltimore & Eastern R.R. Co. | Jan-75 | |
| Consolidated Rail Corp. | Jan-80 | |
| BECX | Buffalo Electro-Chemical Co. | 4/38-1/52; eliminated 4/55 |
| Becco Chemical Division, Food Machinery and Chemical Corp. | added 4/55; 10/57-4/61 | |
| FMC Corp., Inorganic Chemicals Division | Jul-65 | |
| FMC Corp. | Oct-66 | |
| FMC Corp., Inorganic Chemicals Division | 4/70-1/80 | |
| FMC Corp. | eliminated 7/93; 1/94; eliminated 10/97; 7/2000; added 10/2000 | |
| BEDT | Brooklyn Eastern District Terminal | 1/75-1/80; eliminated 10/83 |
| BEEM | Beech Mountain R.R. Co. | 1/75-7/2000 |
| BEKR | Berks Rail Corp. | eliminated 10/84 |
| BELX | Belle Haven Foods, Inc. | Jul-00 |
| BENX | Bennett Lumber Products, Inc. | added 10/72; 1/75-1/80; eliminated 4/93; 1/94 |
| Investor's Property Service | Jul-00 | |
| BEPX | Belcher Oil Co. | 4/38-4/61; eliminated 4/62; added 11/73; 1/75; eliminated 7/78 |
| Coastal States Energy Co. | added 7/78; 1/80; eliminated 4/86 | |
| Wycon Chemical Co. | added 4/86 | |
| BFC | Bellefonte Central R.R. Co. | 7/23-10/66 & 1/75-1/80; eliminated 7/84 |
| BFCF | Bremerton Freight Car Ferry | 1/75-1/80 |
| BFCX | Berger Foods Co. | 4/38-1/52; eliminated 4/54 |
| Berwick Freight Car Co. | 1/94-7/2000 | |
| BFFX | Berwick Forge and Fabricating Division, Whittaker Corp. | added 1/83 |
| Greenlease, Inc. | eliminated 10/87 | |
| BFGX | The B.F. Goodrich Co. | 7/65-10/66; eliminated 10/69 |
| Rail-U.S. Leasing, Inc. | eliminated 4/78 | |
| U.S. Rail Services, Inc. | added 4/78; 1/80; eliminated 7/81 | |
| B.F. Goodrich Co., Chemical Group | added 7/81; 1/94 | |
| The B.F. Goodrich Co. & Chemical Group | eliminated 10/95 | |
| The GEON Co. | added 4/96 | |
| Oxy Vinyls L.P. | added 7/99; 7/2000 | |
| BFIF | Big Fork & International Falls Ry. | Apr-38 |
| BFIX | Borden's Farm Products Division of the Borden Co. | 4/38-1/52 |
| Brown Forest Industries Ltd., a Division of Brown Co. | added 1/69 (reporting marks changed from KVPX); 4/70-1/80; eliminated 4/81 | |
| Bethlehem Steel Corp. | added 7/95; eliminated 1/99; 7/2000 | |
| BFJR | Brillon & Forest Junction R.R. Co. | added 4/79; 1/80; eliminated 1/85 |
| BFRR | Buffalo Ridge R.R., Inc. | added 4/89; eliminated 4/93; 1/94-7/2000 |
| BFX | Best Foods, Inc. | 4/38-10/57; eliminated 1/59 |
| Best Foods Division of Corn Products Co. | added 1/59 | |
| Crystal Car Line | 4/61-4/70; eliminated 1/67 | |
| B&G | Bingham & Garfield Ry. Co. | 23-Jul |
| BG | Bingham & Garfield Ry. | 4/38-1/52 |
| BGCX | Belleville Gas Corp., Inc. | added 1/66; 10/66; eliminated 7/68 |
| Belleville Gas Corp. | 4/70-1/80 | |
| BGEX | General Electric Railcar BRAE Services Corp. | added 4/90; eliminated 4/91 |
| General Electric Railcar Services Corp. | added 4/91; eliminated 10/93 | |
| U.S. Rail Services, Inc. | added 10/93; 1/94; eliminated 4/94 | |
| USL Capital Rail Services | added 4/94; eliminated 10/96 | |
| GATX Capital Corp. | added 10/96; 7/2000 | |
| BGSX | Strata Corp. | added 10/97; eliminated 4/98; 7/2000 |
| BH | Bath and Hammondsport R.R. Co. | 1/75; added 7/79; 1/80; eliminated 10/93; 1/94 |
| BHIX | Burlington Refrigerator Express Co. | 1/52-10/66; eliminated 7/68; 4/70-1/75 |
| BHP | BHP Nevada R.R. Co. | Jul-00 |
| BHPX | Bodie-Hoover Petroleum Corp. | Apr-38 |
| BHTX | A.R. Blossman, Sr. | eliminated 4/62 |
| Blossman Hydratane Gas, Inc. | added 4/62; 7/65; eliminated 10/65 | |
| Barnhart Crane & Rigging Co. | added 7/98; 7/2000 | |
| BHWX | Western Refrigerator Line Co. | Apr-70 |
| BIAX | Ocala Recycling Co. | eliminated 7/97; 7/2000 |
| BICX | Beker Industries Corp. | added 4/81; eliminated 7/88 |
| BIGX | Big Three Industrial Gas & Equipment Co. | added 4/69; 4/70 |
| Big Three Industries, Inc. | 1/75-1/80; eliminated 1/91 | |
| Liquid Air Corp. | added 1/91; 1/94; eliminated 1/95 | |
| Air Liquide America Corp. | added 1/95; 7/2000 | |
| BIIX | Buckeye Steel Castings Co. | added 1/69; 4/70-1/80; eliminated 1/81 |
| BIRR | Bellingham International R.R. LLC | Jul-00 |
| BISX | Brandenburg Industrial Service Co. | added 1/99; 7/2000 |
| BITY | Bristol Industrial Terminal Ry., Inc. | added 10/92; 1/94; eliminated 1/96 |
| Penn Eastern Rail Lines Inc. | added 4/98; 7/2000 | |
| BIX | Atchison Bridge Co., Inc. | added 7/56; 10/57-4/70; eliminated 10/72 |
| BJGX | B.J. Gas Supply, Inc. | added 10/66; 10/66-1/94; eliminated 1/2000; 7/2000 |
| BJHX | BJ Hughes Inc. | added 10/81; eliminated 10/87 |
| BJ Titan Services Co. | added 10/87; 1/94-7/2000 | |
| BJOX | B.J.O. Corp. | added 10/87; eliminated 7/89 |
| Chrysler Rail Transportation Corp. | added 7/89 | |
| Citicorp Railmark, Inc. | 1/94-7/2000 | |
| BJRY | Burlington Junction Ry. | eliminated 7/86; 1/94-7/2000 |
| BKCX | The Berkshire Chemical Co. | Apr-38 |
| BKLX | Bakelite Corp. | Apr-38 |
| BKRR | Batten Kill R.R. Co., Inc. | added 10/82; eliminated 1/87 |
| Batten Kill R.R. Co. | eliminated 4/92; 1/94 | |
| Batten Kill R.R. Co., Inc. | Jul-00 | |
| BKTY | Missouri-Kansas-Texas R.R. Co. | 10/66-1/80; eliminated 1/90 |
| BKTY | Missouri Pacific System | added 1/90; 1/94; eliminated 4/97 |
| Union Pacific R.R. Co. | added 4/97; 7/2000 | |
| BKX | Blaw-Knox Co. | 4/38-4/70; eliminated 1/74 |
| BLA | The Baltimore and Annapolis R.R. Co. | 1/75-1/80; eliminated 10/91 |
| BLC | Butler County R.R. Co. | 23-Jul |
| BLCX | Bernuth, Lembcke Co., Inc. | Jan-52 |
| The Commonwealth Plan, Inc. | Jul-65 | |
| Commonwealth Plan, Inc. (Subsidiary of Bankers Leasing Corp.) | added 10/65 | |
| Bankers Leasing Corp. (Commonwealth Plan, Inc.) | Oct-66 | |
| The Commonwealth Plan, Inc. | 4/70-7/2000 | |
| B&LE | Bessemer & Lake Erie R.R. | 7/23-10/66 |
| BLE | (B&LE) Bessemer & Lake Erie R.R. Co. | Apr-70 |
| Bessemer & Lake Erie R.R. Co. | 4/70-7/2000 | |
| BLHX | Baldwin-Lima-Hamilton Corp. | added 4/54; 10/57 |
| Baldwin-Lima-Hamilton Corp., Industrial Equipment Division | 4/61-4/70 | |
| BLKM | Black Mesa & Lake Powell | 1/80-7/2000 |
| BLMR | Blue Mountain R.R., Inc. | 1/94-7/2000 |
| BLOL | The Bloomer Line | eliminated 7/89; 1/94-7/2000 |
| BLR | Blue Ridge Ry. Co. (Southern Ry. System) | 23-Jul |
| BLX | Bisbee Linseed Co. | Apr-38 |
| B&M | Boston and Maine R.R. | 23-Jul |
| BM | Boston and Maine R.R. | 4/38-4/70 |
| Boston and Maine Corp. | 1/75-1/80 | |
| Boston and Maine R.R. | Jan-94 | |
| ST Rail System | Jul-00 | |
| BMCX | Brown-Miller Co. | 1/52-10/66; eliminated 7/67 |
| Bluewater Michigan Chapter, Inc. | Jul-00 | |
| BMDX | North American Car Corp. | added 7/66; 10/66-1/80 |
| General Electric Railcar Services Corp. | 1/94; eliminated 10/94 | |
| BME | Beaver, Meade & Englewood | Jan-75 |
| BMEX | Bertrand Mill & Elevator Co., Inc. | added 1/79; 1/80; eliminated 7/80 |
| BMH | Beaufort and Morehead R.R. Co. | 1/75-1/80; eliminated 1/87; 1/94-7/2000 |
| BMIX | Baltic Mills, Inc. | added 7/79; 1/80; eliminated 1/81 |
| BML | Belfast and Moosehead Lake R.R. Co. | added 7/74; 1/75; eliminated 7/77; 1/80; eliminated 7/91; 1/94-7/2000 |
| BMMX | Transit Co., Ltd. | 4/38-4/70; eliminated 4/73 |
| BMPX | The Borden Co., Manufactured Products Division | Jan-52 |
| The Borden Food Products Co. Division of the Borden Co. | eliminated 10/53 | |
| BMRG | The Blue Mountain and Reading R.R. | added 10/84; 1/94; eliminated 4/94; 7/2000 |
| BMS | Berlin Mills Ry., Inc. | 1/75; added 7/79; 1/80-1/94; eliminated 7/99 |
| St. Lawrence & Atlantic R.R. Co. | added 7/99; 7/2000 | |
| BMSX | Bemis Co., Inc. | added 1/97; eliminated 1/98; 7/2000 |
| BMX | The Barrett Co. | Apr-38 |
| The Barrett Division, Allied Chemical & Dye Corp. | 1/52-10/57; eliminated 7/58 | |
| The Barrett Division, Allied Chemical Corp. | added 7/58; 4/61 | |
| BN | Burlington Northern Inc. | 1/75-1/80; eliminated 7/81 |
| Burlington Northern R.R. Co. | added 7/81; 1/94 | |
| Burlington Northern Santa Fe Ry. Co. | Jul-00 | |
| BNFE | Burlington Northern Inc. | 1/75-1/80; eliminated 7/81 |
| Burlington Northern R.R. Co. | added 7/81; 1/94 | |
| Burlington Northern Santa Fe Ry. Co. | Jul-00 | |
| BNLX | BN Leasing Corp. | Jan-94 |
| BNML | Burlington Northern (Manitoba) Ltd. | 1/75-7/2000 |
| BNQ | Burlington Northern R.R. Co. | Jan-94 |
| Burlington Northern Santa Fe Ry. Co. | Jul-00 | |
| BNRQ | Burlington Northern Santa Fe Ry. Co. | Jul-00 |
| BNSF | Burlington Northern R.R. Co. | added 4/96 |
| Burlington Northern Santa Fe Ry. Co. | Jul-00 | |
| BNX | Westinghouse Electric Corp., Benolite Division | Jan-52 |
| Westinghouse Electric Corp., Benolite Dept. | Oct-57 | |
| B&O | Baltimore & Ohio R.R. Co. | 4/38-10/66 |
| BO | Baltimore & Ohio R.R. Co. | 1/75-1/80; eliminated 7/87 |
| The Chesapeake and Ohio Ry. Co. | added 7/87; eliminated 10/87 | |
| CSX Transportation, Inc. | added 10/87; 1/94-7/2000 | |
| BOBX | Freeman Gas of N.C., Inc. | added 1/71; 1/75-7/2000 |
| BOCT | The Baltimore and Ohio Chicago Terminal R.R. Co. | 1/75-7/2000 |
| BOCX | BOC Gases | added 1/2000; 7/2000 |
| BOCY | Boat Co. | added 5/83; eliminated 1/88 |
| BOP | Border Pacific R.R. Co. | added 4/84; 1/94-7/2000 |
| BORX | U.S. Borax Inc. | added 1/95; 7/2000; eliminated 7/2000 |
| BOWX | Bowman Dairy Co. | 4/38-4/61 |
| BPAX | U.S. Dept. of the Interior, Bonneville Power Administration | added 1/53 |
| Bonneville Power Administration | 10/57-7/65 | |
| U.S. Dept. of the Interior, Bonneville Power Administration | Oct-66 | |
| Bonneville Power Administration | 4/70-1/75 | |
| U.S. Dept. of the Interior, Bonneville Power Administration | eliminated 1/78 | |
| U.S. Dept. of Energy, Bonneville Power Administration | added 1/78; 1/80-7/2000 | |
| BP&C | Bay Point & Clayton R.R. | Apr-38 |
| BPCX | Barada & Page, Inc. | Apr-61 |
| McKesson & Robbins, Inc. | eliminated 7/65 | |
| Basin Electric Power Cooperative | 1/94-7/2000 | |
| BPIX | Budlong Pickle Co. | 4/38-10/57; eliminated 10/59 |
| Budlong Pickle Co. Division of Green Bay Food Co. | added 10/59; eliminated 1/60 | |
| Buckeye Power Inc. | added 7/75; eliminated 10/78 | |
| Novacor Chemicals Inc. | added 10/96; eliminated 4/97 | |
| Nova Chemicals Inc. | Jul-00 | |
| BPLX | Novacor Chemicals Inc. | added 10/96; eliminated 4/97 |
| Nova Chemicals Inc. | Jul-00 | |
| BPOX | BP Oil Inc. | added 4/85; eliminated 1/90 |
| BP Oil Co. | added 1/90; 1/94 | |
| BP Amoco Chemical Co. | eliminated 1/2000 | |
| BP Amoco Chemical Co., BP Oil Division | added 1/2000; 7/2000 | |
| BPPX | Bay State Milling Co. | added 1/81 |
| Brewster Phosphates of Bradley, Florida | eliminated 4/87 | |
| International Minerals & Chemical Corp. | eliminated 4/88 | |
| IMC Fertilizer, Inc. | added 4/88; 1/94; eliminated 4/94 | |
| GATX Capital Corp. | added 10/94; 7/2000 | |
| BPRR | Buffalo & Pittsburgh R.R., Inc. | added 10/88; 1/94-7/2000 |
| BPX | Bond Pickle Co., Inc. | 1/52-10/57; eliminated 1/60 |
| BQ | Bay of Quinte Ry. Co. (Canadian National Rys.) | 23-Jul |
| BR | Bradford Industrial Rail, Inc. | added 7/93; 1/94-7/2000 |
| BRAN | Brandon Corp. | added 7/78; 1/80-7/2000 |
| BRAX | Brae Corp. | 1/80; added 10/80; eliminated 7/84 |
| Brae Transportation Inc., a subsidiary of Brae Corp. | added 7/84; eliminated 1/90 | |
| General Electric Railcar Services Corp. | added 1/90; 1/94; eliminated 4/99 | |
| The CIT Group/Capital Finance, Inc. | added 4/99; 7/2000 | |
| BRBX | Bombardier Transportation | Jul-00 |
| BRC | Belt Ry. Co. of Chicago | 7/23-7/2000 |
| BRCX | Burlington Refrigerator Express Co. | added 7/63; 7/65-4/70; eliminated 10/70 |
| Western Fruit Express Co. | added 10/70; eliminated 4/74; 1/75 | |
| Bunge Corp. | added 1/99; 7/2000 | |
| BRCY | Cando Contracting Ltd. | Jul-00 |
| BRDX | Burlington Refrigerator Express Co. -- temporary expiring 31Dec52 | Jan-52 |
| BRE | Burlington Northern Inc. | 1/80; eliminated 7/81 |
| Burlington Northern R.R. Co. | added 7/81 | |
| BREX | Burlington Refrigerator Express Co. | 4/38-4/70; eliminated 10/70 |
| Western Fruit Express Co. | added 10/70; 1/75-1/80; eliminated 1/80 | |
| Big Rivers Electric Corp. | 1/94; eliminated 7/99; 7/2000 | |
| BRFD | Branford Steam R.R. | 1/80-7/2000 |
| BRG | Brownsville and Rio Grande International R.R. | added 4/84; 1/94-7/2000 |
| BRIX | Incobrase Industries, Ltd. | added 4/97; 7/2000 |
| BRKX | Burke Energy Corp. | added 4/82; eliminated 7/88 |
| Petroleum Products, Inc. | added 7/88; eliminated 10/89 | |
| M. Corp. Management Solutions, Inc. | added 10/89; eliminated 4/90 | |
| BRLX | BRS Leasing Co., Inc. | added 1/80; 1/80; eliminated 1/91 |
| Berwind Ry. Service Co. | Jan-94 | |
| BRMX | Burlington Refrigerator Express Co. | added 7/63; 7/65-4/70; eliminated 10/70 |
| Western Fruit Express Co. | added 10/70; eliminated 1/73; 1/75 | |
| BRNX | Burlington Refrigerator Express Co. | Jan-52 |
| BR&P | Buffalo, Rochester & Pittsburgh Ry. Co. | 23-Jul |
| Baltimore & Ohio R.R. | Apr-38 | |
| BRI | Burlington-Rock Island R.R. | Jan-52 |
| BRIX | Blue Rock, Inc. | Apr-61 |
| BRR | Belton R.R. Co. | 1/75-1/80; eliminated 10/91; 1/94 |
| BRRC | Borinstein R.R. Co. | 1/94-7/2000 |
| BRRX | Brooklyn Resource Recovery | added 10/96; eliminated 1/98; 7/2000 |
| BRW | Black River and Western Corp. | 1/80-7/2000 |
| BRX | Barium Reduction Corp. | 1/52-10/57; eliminated 10/59 |
| BS | Birmingham Southern R.R. Co. | 4/38-7/2000 |
| B&S | Buffalo & Susquehanna R.R. Corp. | 23-Jul |
| Baltimore & Ohio R.R. | Apr-38 | |
| BS&C | Big Sandy & Cumberland R.R. Co. | 23-Jul |
| BSCX | Bethlehem Steel Corp. | added 10/70; 1/75-7/2000 |
| BSDA | BSDA R.R. | added 10/89; eliminated 7/91; 1/94-7/2000 |
| BSDX | Border States Distributing Co. | Jan-52 |
| B&SE | Birmingham & Southeastern R.R. | 4/38-7/65 |
| BSGX | Becker Sand & Gravel Co. | added 10/69; 4/70-1/75 |
| BSHX | B.A.-Shawinigan Ltd. | 10/57-4/61; eliminated 4/62 |
| BSIX | Bethlehem Steel Corp. | added 1/94; 7/2000 |
| BS&K | Big Sandy & Kentucky River Ry. Co. | 23-Jul |
| BSLX | Bethlehem Steel Co. (General American Transportation Corp.) | Apr-38 |
| BSMX | United States Leasing International, Inc. | 1/75-1/80; eliminated 10/82 |
| Bay State Milling Co. | eliminated 10/93; 1/94; added 10/96; eliminated 4/97; 7/2000 | |
| BSOR | Buffalo Southern R.R., Inc. | added 7/82; 1/94-7/2000 |
| BSPX | Otter Tail Power Co. | added 1/75; 1/75-7/2000 |
| BSRX | Branson Scenic Ry., Inc. | Jul-00 |
| BSTX | Trinitas Corp. | added 1/80; 1/80-1/94; eliminated 1/95; 7/2000 |
| BSW | Batesville Southwestern R.R. | 23-Jul |
| BTAX | Big Three Lincoln-Alaska, Inc. | added 10/81; 1/94; eliminated 4/97 |
| Air Liquide America Corp. | added 4/97; 7/2000 | |
| BTC | Birmingham Terminal | 1/94-7/2000 |
| BTCO | Boston Terminal Co. | 1/75-7/2000 |
| BTEX | BTE Equipment, LLC | Jul-00 |
| BTLX | W.H. Barber Co. | 4/38-4/61; eliminated 1/65 |
| BTN | Bauxite & Northern Ry. Co. | 23-Jul |
| BTRX | Rocky Mountain Transportation Services | Jul-00 |
| BTTX | Trailer Train Co. | 4/61-7/65 |
| Trailer Train Co. (FA flat cars equipped with bi-level automobile carrying superstructures furnished by member railroads. Cars are not equipped with hitches and bridge plates) | 10/66-10/68 | |
| Trailer Train Co. | Apr-70 | |
| Trailer Train Co. (Flat cars, equipped with bi-level auto racks furnished by participant railroads) | 1/75-1/80 | |
| Trailer Train Co. | eliminated 1/92 | |
| TTX Co. | added 1/92 | |
| TTX Co. (140 ft. intregal articulated bi-level auto rack with end of car cush.) | Jul-00 | |
| BUDX | American Refrigerator Transit Co. | 10/66; eliminated 10/67 |
| The Budd Co. (temporary) | 1/94-7/2000 | |
| BUGX | Bruggere & Monson | Jul-00 |
| BUKX | General American Transportation Corp. | added 1/88 |
| Louisville Gas and Electric Co. | added 7/89; 1/94-7/2000 | |
| BUNX | The Buncher Co. | added 7/74; 1/75-1/80; eliminated 4/86 |
| BURX | Burris Chemical, Inc. | added 1/72; eliminated 10/74 |
| BVCX | Burgie Vinegar Co. | Apr-38 |
| West Coast Express | Jul-00 | |
| BVDX | Beverage Ventilated Despatch (Merchants Despatch Transportation Corp.) | Apr-38 |
| BVDX | Merchants Despatch Transportation Corp. | 1/52-4/61 |
| BVHX | B.V. Hedrick Gravel & Sand Co. | 1/75-7/2000 |
| BVRY | Brandywine Valley R.R. Co. | added 7/82; 1/94-7/2000 |
| BV&S | Bevier & Southern R.R. Co. | 7/23-10/66 |
| BVS | Bevier & Southern R.R. Co. | 1/75-1/80; eliminated 1/83 |
| BWC | Pennsylvania R.R. | 7/65-10/66 |
| Penn Central Transportation Co. | Jan-75 | |
| Penn Central Transportation Co., Robert W. Blanchette, Richard C. Bond and John H. McArthur, Trustees | eliminated 4/76 | |
| Consolidated Rail Corp. | added 4/76; 1/80-1/94 | |
| BWCMCo. | Berwind-White Coal Mining Co. | Apr-38 |
| BWCX | Berwind-White Coal Mining Co. | 4/38-4/61 |
| Borg-Warner Chemicals | 1/80; eliminated 10/89 | |
| G.E. Plastics | added 10/89; 1/94-7/2000 | |
| BWIX | Borden-Wieland Division of the Borden Co. | Apr-38 |
| BWTX | Big West Oil Co. of Montana | 4/38-10/66; eliminated 1/69; 4/70 |
| The Babcock & Wilcox Co., Tubular Products Division | added 1/74; 1/75-1/80; eliminated 7/81 | |
| The Babcock & Wilcox Co., Tubular Products Group | added 7/81; eliminated 1/82 | |
| BXBX | BXB Corp. | added 10/96; eliminated 4/97; added 7/97; eliminated 10/97; 7/2000 |
| BXN | Bauxite & Northern Ry. Co. | 1/75-1/94; eliminated 10/96; 7/2000 |
| BYAX | Byerlyte Corp. | 1/52; eliminated 10/53 |