T and P Ry., Inc.	TAP	added 1/92; eliminated 7/93; 1/94
T.A.D. Jones & Co., Inc.	TADX	4/38-1/52
T.G. Bright & Co., Ltd.	TGBX	Apr-38
Tacoma Eastern Ry. Co.	TE	added 4/95; eliminated 7/97; 7/2000
Tacoma Electrochemical Co. (Pennsylvania Salt Mfg. Co. of Washington)	TELX	4/38-1/52
Tacoma Municipal Belt Line Ry.	TMBL	1/75-7/2000
Talleyrand Terminal R.R. Co., Inc.	TTR	Jul-00
Tamak Gas Products Co., Inc.	TGPX	added 4/62
Tamak Transportation Corp.	TGPX	7/65-7/2000
Tampa Southern R.R. Co.	TAS	1/75-1/80
Tanco Transportation Corp.	TATX	added 7/79; 1/80; eliminated 4/89
Tangipahoa & Eastern	TAEA	1/75-1/80
Tank Car Corp. of America	HMHX	4/38-1/75; eliminated 10/78
	NAMX	Jan-52
Tank Car Despatchers Service, Inc.	TCDX	10/57; eliminated 1/58
Tank Car Services, Inc.	TCSX	added 1/80; 1/80; eliminated 1/86
	JBIX	added 1/81; eliminated 1/86
	MBBX	added 1/81; eliminated 1/86
Tank Gas Corp.	TGCX	1/52-4/61; eliminated 7/63
Tank Line Service, Inc.	TLSX	1/52-4/61; eliminated 1/62
Tank Specializing Co.	TSX	1/52-4/61
Tarmac, Fla., Inc.	DCAX	added 10/89; 1/94
	DCAX	eliminated 7/97; 7/2000
Tarmac, Fla., Inc., c/o Delray Connecting R.R. Co.	DCAX	added 10/96
Tasco, Inc.	TASX	added 4/62; 7/65; eliminated 10/65
Tauber Transportation Co.	OJTX	added 7/78; 1/80; eliminated 7/84; 1/94
Tavares & Gulf R.R.	TV&G	4/38-4/70
Taylor Chemical Corp.	TCCX	Apr-38
Taylor-Colquitt Co.	TCPX	1/52-10/57
TCCX Corp.	TCCX	added 4/80; eliminated 1/91; 1/94-7/2000
TCL, Inc.	ROYX	added 7/73; 1/75-1/80; eliminated 10/88
Teal Tank Car Co.	TEAX	added 7/67; 4/70; eliminated 7/73
Teas Extract Co.	TXCX	4/38-1/52; eliminated 7/56
Teas Extract Co.	ATEX	4/38-1/52; eliminated 7/56
TEC Terminals, Inc.	TECX	added 7/70
Technical Propellants, Inc.	TPGX	added 10/90; 1/94-7/2000
	LBWX	added 1/95; 7/2000
Temco Corp.	TMCX	added 10/84; 1/94; eliminated 10/96
	TMLX	added 1/88; 1/94; eliminated 10/96; 7/2000
Temiscouata Ry.	TMC	Apr-38
Temiskaming & Northern Ontario Ry.	TEM	Apr-38
	TEM	1/75-1/80
Temple-Eastex Inc.	TEMX	added 10/78; 1/80; eliminated 7/89
Temple-Inland Forest Products Corp.	TEMX	added 7/89; 1/94-7/2000
Tenneco Packaging Co.	TMAX	Jul-00
Tenneco Packaging Inc.	TMAX	added 7/98
Tennessee Central Ry. Co.	TC	4/38-10/66
Tennessee Chemical Co.	TCDX	added 1/83; eliminated 10/84
Tennessee Coal, Iron and Railroad Co.	TCIX	4/38-1/52
Tennessee Corp.	TENX	Jan-52
Tennessee Eastman Co.	ETCX	Oct-66
Tennessee Eastman Co., Division of Eastman Kodak Co.	ETCX	1/52-7/65
	ETCX	4/70-1/94; eliminated 7/94
Tennessee Eastman Corp.	ETCX	Apr-38
Tennessee Products & Chemical Corp.	TPDX	1/52; eliminated 4/57
Tennessee Products Corp.	TPDX	Apr-38
Tennessee River Pulp & Paper Co.	TMAX	added 7/75; 1/80; eliminated 10/91
Tennessee Ry. Co.	TENN	1/75-7/2000
Tennessee Southern R.R. Co., Inc.	TSRR	added 7/88; 1/94; eliminated 7/95; 7/2000
Tennessee Valley Authority	TVAX	7/65-7/2000
	ABCX	Jan-94
Tennessee, Alabama & Georgia Ry. Co.	TA&G	4/38-4/70
	TAG	1/75-1/80
Tennken R.R. Co., Inc.	TKEN	added 4/84; 1/94-7/2000
TennRail Corp.	TNR	added 4/92; 1/94; eliminated 7/94
	CCR	added 4/92; 1/94; eliminated 7/94
Tennsv, Inc.	TSVX	1/94-7/2000
Terminal Ferroviaria Del Valle De Mexico, S.A. de C.V.	TFVM	Jul-00
Terminal Grain Corp.	TRGX	added 7/74; 1/75-1/80; eliminated 7/93
Terminal R.R. Association of St. Louis	TRRA	4/38-7/2000
Terminal Ry. Alabama State Docks	TASD	1/75; added 7/77; 1/80-7/2000
Terra International, Inc.	SGSX	Jul-00
Terra Nitrogen Limited Partnership	AGMX	added 10/96; 7/2000
Terre Haute, Brazil & Eastern R.R.	TBER	added 4/88; eliminated 1/94; 7/2000
Tetra Technologies, Inc.	TREX	added 1/90; 1/94; eliminated 4/2000; 7/2000
Texaco Chemical Co.	GETX	1/94; eliminated 4/94
Texaco Inc.	TOLX	eliminated 7/63
Texaco Refining and Marketing, Inc.	GETX	added 4/94; eliminated 1/95
Texaco, Inc. (General American Transportation Corp.)	TCX	Oct-66
Texarkana Union Station Trust	TUST	1/75-7/2000
Texas & New Mexico Division, Austin & Northwestern R.R. Co., Inc.	TNMR	added 1/90; 1/94-7/2000
Texas & New Orleans R.R.	T&NO	4/38-4/61
	TNO	10/57-4/61
Texas & Northern Ry. Co.	TN	1/52-1/94; eliminated 1/99; 7/2000
Texas & Pacific Ry.	T&P	4/38-4/70
Texas & Pacific Ry. Co.	TP	10/57-1/75; eliminated 1/77
Texas Alkyls, Inc.	TAIX	added 4/90; eliminated 4/91; 1/94-7/2000
Texas and New Orleans R.R. Co. (Southern Pacific Co.)	T&NO	Oct-66
Texas and Oklahoma R.R. Co.	TXOR	1/94-7/2000
Texas and Pacific Railway Co.	ABM	1/75; eliminated 1/77
	KOG	1/75; eliminated 1/77
	LOA	1/75; eliminated 1/77
	LOC	1/75; eliminated 1/77
	MOD	1/75; eliminated 1/77
Texas and Pacific Ry. Co.	TPL	1/75; eliminated 1/77
Texas Calgary Co.	MTCX	10/57; eliminated 1/60
Texas Central Business Lines Corp.	TCB	added 4/2001
Texas Central R.R. Co.	TEXC	4/70-1/80; eliminated 7/92; 1/94-7/2000
Texas Chemical Co. (Consolidated Chemical Industries Inc.)	TTCX	Apr-38
Texas City Terminal Ry. Co.	TCT	4/38-7/2000
Texas Crushed Stone Co.	TECX	added 10/82; eliminated 5/83; 1/94
Texas Gulf Sulphur Co.	TGSX	7/65-4/70
	TGX	Apr-38
Texas Gulf, Inc.	TGIX	added 10/72
Texas Industries, Inc.	TXIX	1/94-7/2000
Texas Municipal Power Agency	TMPX	added 1/82; eliminated 5/83; added 10/83; 1/94; eliminated 10/96; 7/2000
Texas Natural Gasoline Corp.	TNGX	1/52-10/57; eliminated 7/60
Texas North Western Ry. Co.	TXNW	added 1/83; 1/94; eliminated 7/95; 7/2000
Texas Northeastern Division, Mid-Michigan R.R., Inc.	TNER	added 1/91; 1/94-7/2000
Texas Pacific Coal and Oil Co.	TTX	Apr-38
Texas Pacific-Missouri Pacific Terminal R.R. of New Orleans	TPMP	1/75; eliminated 4/78
Texas Petrochemicals Corp.	TXPX	1/94; eliminated 10/98; 7/2000
Texas Petrochemicals Corp.	PTCX	added 1/85; added 10/86
Texas Power & Light Co.	TPRX	1/52-10/57; eliminated 1/58; added 7/80; 1/94
Texas Railcar Leasing Co.	TRLX	added 7/89; 1/94-7/2000
Texas Refining Co.	TRCX	Apr-38
Texas Rock Crusher Ry. Co.	TXR	Jul-00
Texas South-Eastern Ry. Co.	TSE	1/75; added 4/79; 1/80-7/2000
Texas Sulphur Products Co.	TSPX	added 4/79; 1/80
Texas Sulphur Products Co., Inc.	TSPX	eliminated 4/79
Texas Tanning Extract Co.	TTNX	Jan-52
Texas Transportation Co.	TXTC	added 7/82; eliminated 1/91; 1/94-7/2000
Texas Ultra Pure, Inc.	TUPX	Jul-00
Texas Utilities Generating Co.	TUGX	1/80; eliminated 1/88; 1/94
Texas Utilities Mining Co.	TUGX	added 1/88; 1/94-7/2000
Texas Vegetable Oil Co.	TVOX	1/52; eliminated 4/54
Texas, Gonzales & Northern Ry. Co.	TXGN	added 7/93; 1/94-7/2000
Texas, Oklahoma & Eastern R.R. Co.	TOE	1/75-7/2000
Texasgulf Inc.	TGAX	added 10/80; 1/94; eliminated 10/95
	TGIX	1/75; eliminated 1/78
	TGIX	1/94; eliminated 10/95
	TGSX	1/75; eliminated 1/78
Texasgulf Inc., Agricultural Chemicals Operation	TGAX	added 1/78; 1/80; eliminated 10/80
Texasgulf Inc., Soda Ash Operation	TGSX	added 1/78; 1/80-1/94; eliminated 10/95
Texasgulf Inc., Sulphur Operation	TGIX	added 1/78; 1/80; eliminated 10/80
Texas-New Mexico Ry. Co.	TNM	Jan-75
	ARMH	added 7/75
Texoma AG Products Inc.	TAGX	Jul-00
Textiles Monterrey, S.A.	TMOX	Jan-52
TFM, S.A. de C.V.	TFM	added 10/97; 7/2000
	FNE	added 10/97; eliminated 4/99; 7/2000
TG Soda Ash, Inc.	TGSX	added 10/95; eliminated 4/2000
The Ahnapee & Western Ry. Co.	AHW	added 7/78; 1/80; eliminated 1/94
The Ahnapee & Western Ry. Co., a Division of McCloud River R.R. Co.	AHW	1/75; eliminated 7/77
The Alabama and Vicksburg Ry. Co.	A&V	23-Jul
The Albro Packing Co.	APX	1/52-10/57; eliminated 7/58
The Algoma Steel Co., Ltd.	ASCX	added 1/85
The Algoma Steel Corp., Ltd.	ASCX	eliminated 10/87
The Altus Co.	SMCX	added 1/62
The American Coal Sales Co.	TACX	Jul-00
The Anaconda Co.	ANAX	10/57; eliminated 10/60
The Andersons	TAEX	added 10/2000
	AEX	7/65-7/2000
	BAEX	added 4/95; 7/2000
The Ansul Co.	ACCX	added 7/64; 7/65-1/80; eliminated 5/83
The Arcata and Mad River R.R. Co.	AMR	added 11/73; 1/75-1/80; eliminated 4/85
The Arkansas Co.	ARKX	Jan-52
The Arkansas Western Ry. Co.	ARW	1/75-7/2000
The Atchison, Topeka and Santa Fe Ry. Co.	TPW	eliminated 7/88
	ATSU	added 4/75
The Atlanta, Stone Mountain & Lithonia Ry. Co.	ASML	1/75-1/80
The Aycock Co.	AYCX	7/65; eliminated 10/65
The B.F. Goodrich Co.	BFGX	7/65-10/66; eliminated 10/69
The B.F. Goodrich Co. & Chemical Group	BFGX	eliminated 10/95
	CAOX	added 10/95
The Babcock & Wilcox Co.	BAWX	added 4/69; 4/70-7/2000
The Babcock & Wilcox Co., Tubular Products Division	BWTX	added 1/74; 1/75-1/80; eliminated 7/81
The Babcock & Wilcox Co., Tubular Products Group	BWTX	added 7/81; eliminated 1/82
The Baltimore and Annapolis R.R. Co.	BLA	1/75-1/80; eliminated 10/91
The Baltimore and Ohio Chicago Terminal R.R. Co.	BOCT	1/75-7/2000
The Barber Co., Inc.	BAX	Apr-38
The Barrett Co.	BMX	Apr-38
The Barrett Division, Allied Chemical & Dye Corp.	BMX	1/52-10/57; eliminated 7/58
The Barrett Division, Allied Chemical Corp.	BMX	added 7/58; 4/61
The Bay Line R.R., L.L.C.	AG	added 1/97; eliminated 7/97
	AG	added 4/98; eliminated 7/98
	ASAB	added 4/94; 7/2000
	BAYL	added 4/94; 7/2000
The Berkshire Chemical Co.	BKCX	Apr-38
The Blanton Co.	BCTX	Apr-38
The Bloomer Line	BLOL	eliminated 7/89; 1/94-7/2000
The Bloomsburg and Sullivan R.R. Co.	BBS	23-Jul
The Blue Mountain and Reading R.R.	BMRG	added 10/84; 1/94; eliminated 4/94; 7/2000
The Boeing Co.	TBCX	added 1/68; 4/70-7/2000
The Borden Co., Chemical Division	BCDX	10/57; eliminated 10/60
The Borden Co., Manufactured Products Division	BMPX	Jan-52
The Borden Food Products Co. Division of the Borden Co.	BMPX	eliminated 10/53
The Budd Co. (temporary)	BUDX	1/94-7/2000
The Buncher Co.	BUNX	added 7/74; 1/75-1/80; eliminated 4/86
The Burlington Northern Santa Fe Ry. Co.	ATSF	added 7/97; 7/2000
	SFQ	Jul-00
	SPS	Jul-00
The Calco Chemical Co., Inc.	CALX	Apr-38
The California Conserving Co., Inc.	CHBX	Apr-38
The Canada and Gulf Terminal Ry. Co.	CGT	1/75-1/94; eliminated 4/95; 7/2000
The Canadian Wheat Board	CNWX	added 1/73; 1/75-7/2000
	CPWX	added 1/73; 1/75-7/2000
The Caney Fork and Western R.R.	CFWR	added 1/86; eliminated 4/87; 1/94-7/2000
The Canfield Tank Line	CANX	4/38-1/52; eliminated 10/53
The Canton R.R.	CTN	23-Jul
The Capital City Products Co.	CAPX	1/52-4/61; eliminated 7/65
The Carolina Southern R.R. Co.	CALA	added 7/97; 7/2000
	MRR	added 4/96; 7/2000
The Carrollton R.R.	CARR	1/75-1/94; eliminated 4/96; 7/2000
The Carter Oil Co.	EDSX	1/80; eliminated 4/80
The Celotex Corp.	JWCX	added 4/68; 4/70-1/80; eliminated 7/81
The Central R.R. Co. of Indiana	CIND	added 4/92; 1/94-7/2000
The Chesapeake and Ohio Ry. Co.	BO	added 7/87; eliminated 10/87
	WM	added 7/87; eliminated 10/87
The Chesapeake Division	CHRX	1/94-7/2000
The Chicago and Alton R.R. Co.	C&A	23-Jul
The Cimarron River Valley Ry. Co.	CRVC	added 4/85; eliminated 10/89
The Cincinnati Northern R.R. Co.	NOR	23-Jul
The Cincinnati Soap Co. (Hewitt Transportation Co.)	CSCX	Apr-38
The Cincinnati, Indianapolis & Western R.R. Co.	CIWN	23-Jul
The Cincinnati, New Orleans and Texas Pacific Ry. Co.	CNTP	1/75-7/2000
The CIT Group/Capital Finance, Inc.	TCMX	added 1/98; 7/2000
	BRAX	added 4/99; 7/2000
	CEFX	added 1/98; 7/2000
	DBUX	added 1/2001
	GRPX	added 10/99; 7/2000
	SCSX	added 10/98; 7/2000
	USBX	added 4/99; 7/2000
The City Ice and Fuel Co.	CIFX	Apr-38
The Clarendon and Pittsford R.R. Co.	CLP	1/75; added 1/77; 1/80-7/2000
The Cleveland Terminal & Valley Ry., Inc.	CTVX	Jul-00
The Colorado and Southern Ry. Co.	CS	1/75-1/80; eliminated 4/82
	RBCS	1/75-1/80; eliminated 4/82
The Colorado Fuel & Iron Corp.	CFIX	4/38-7/65; eliminated 10/66
The Colorado Midland R.R. Co. (Midland Terminal Ry. Co.)	CM	23-Jul
The Colorado Springs & Cripple Creek District Ry. (Colorado Springs & Cripple Creek R.R.)	CCD	23-Jul
The Columbia Alkali Corp.	CACX	Apr-38
The Columbiana Boiler Co.	CBRX	4/61-7/65; eliminated 4/66
The Columbus & Ohio River R.R. Co.	OHCR	added 10/92
	OSRR	added 10/92
The Columbus & Ohio River Rail Road Co.	CUOH	added 7/92; 1/94-7/2000
The Columbus Rendering Co.	CRX	Apr-38
The Commonwealth Plan, Inc.	APIX	added 7/67; 4/70-7/2000
	BLCX	Jul-65
	BLCX	4/70-7/2000
	VMCX	4/70-7/2000
The Concrete Co.	TCOX	Jul-00
The Consolidated Mining and Smelting Company of Canada, Ltd.	CMSX	4/38-7/65; eliminated 10/66
The Conway Springs Water Co.	CSWX	Apr-38
The Cropmate Co.	CRMX	eliminated 4/86
The Cudahy Oil Tank Line (Cudahy Car Lines)	COTX	Apr-38
The Cudahy Refrigerator Car Line (Cudahy Car Lines)	CRLX	Apr-38
The Cumberland R.R. Co.	CMB	23-Jul
The Cuyahoga Valley Ry. Co.	CUVA	1/75-7/2000
The Dansville & Mount Morris R.R. Co.	D&MM	23-Jul
The David J. Joseph Co.	DJJX	added 10/89; 1/94; eliminated 4/2000
	DJLX	added 10/96; eliminated 7/98
	DJPX	added 7/97; eliminated 4/2000
	DJRX	added 7/96; eliminated 4/2000
	DJTX	added 7/94; eliminated 4/2000
	RLMX	added 1/90; 1/94; eliminated 4/2000
	SSMX	added 4/90; 1/94; eliminated 4/2000
The Delaware, Lackawanna & Western R.R. Co.	DL&W	23-Jul
The Detroit Edison Co.	DEEX	added 10/68; 4/70-7/2000
	DETX	added 4/96; 7/2000
The Detroit Salt Co., L.C.	DSSX	Jul-00
The Dow Chemical Co.	DOWX	4/38-7/2000
The Duluth & Iron Range R.R. Co.	D&IR	23-Jul
The Dupps Co.	DUKX	1/75-7/2000
The Duredo Co.	DRDX	added 7/79; 1/80; eliminated 4/86
The E. Berghausen Chemical Co.	EBCX	Jan-52
The Eagle-Picher Lead Co.	EPLX	Apr-38
The Eagle-Picher Mining & Smelting Co.	EPMX	Apr-38
The El Dorado Refining Co.	EDRX	4/38-10/57; eliminated 10/58
The Empire District Electric Co.	EDEX	added 4/90; eliminated 7/93; 1/94; added 10/96; eliminated 4/97; 7/2000
The Everett R.R. Co.	EV	1/75-1/80; added 10/84; 1/94-7/2000
The Farmers Fertilizer Co.	FFCX	Apr-38
The Fleischmann Transportation Co.	FTCX	Apr-38
The Flintkote Co. of Canada Ltd.	FKRX	4/70; eliminated 10/71
The Flintkote Co., Diamond Kosmos Cement Division	KSMX	added 4/72; 1/75; eliminated 4/76
The Flintkote Co., Eastern Cement Region	KSMX	added 4/76; eliminated 4/78
The Flintkote Co./Kosmos Cement Division	KSMX	added 4/78; 1/80; eliminated 4/81
The Freedom Oil Works Co.	FOWX	Apr-38
The GEON Co.	TGCX	added 7/99; 7/2000; eliminated 1/2001
	BFGX	added 4/96
	GVDX	added 4/96
The Georgia Gulf Corp., Plaquemine Division	GAPX	added 4/85; 1/94-7/2000
The Georgia Northern Ry. Co.	GANO	1/75-7/2000
The Glidden Co., Naval Stores Division	GPX	1/52-4/61
The Golden Cat R.R. Corp.	GCRC	added 7/88; eliminated 4/89; added 7/91; 1/94; eliminated 1/95
The Gopher State Railway Museum Inc.	GRMX	Jul-00
The Grand River Ry. Co.	GRNR	1/75-7/2000
The H.W. Madison Co.	HWMX	4/38-10/57; eliminated 4/61
The Harbauer Co.	THX	Apr-38
The Hegeler Zinc Co.	HZX	4/38-1/52
The Hewitt Soap Co., Inc.	HTX	Apr-38
The Hoosier Connection	HOSC	Jan-80
The Hull Corp.	HDCX	Jan-94
The Huntsville and Madison County R.R. Authority	HMCR	1/94; eliminated 4/97; 7/2000
The Indiana & Ohio Central R.R.	IOCR	added 7/99; 7/2000
The Indiana & Ohio Central R.R., Inc.	IOCR	added 1/88; 1/94
The Indiana & Ohio Eastern R.R., Inc.	IOER	added 1/88; 1/94
The Indiana & Ohio R.R., Inc.	INOH	1/80; added 10/80
	INOH	1/94-7/2000
The Indiana & Ohio Rail Corp.	INOH	eliminated 7/89
The Indiana & Ohio Rail System	CTER	added 4/95; eliminated 7/99
	INOH	added 7/89; added 4/93
	INOR	eliminated 7/94; eliminated 10/98
	IOCR	eliminated 7/99
	IORY	eliminated 7/99
	OIER	eliminated 7/94
The Indiana & Ohio Ry.	IORY	added 7/99; 7/2000
The Indiana & Ohio Ry. Co.	IORY	added 1/88; 1/94
The Indiana Rail Road Co.	INRD	added 4/86; 1/94; eliminated 7/99; 7/2000
The Kanawha Central Ry. Co.	KC	Jan-75
The Kanotex Refining Co.	KOTX	4/38-1/52; eliminated 10/53
The Kansas and Missouri Ry. and Terminal Co.	KM	1/75-1/80; eliminated 10/84
The Kansas City Southern Ry. Co.	CTIE	1/94-7/2000
	KM	added 10/84
	LA	eliminated 1/89; 1/94-7/2000
The Kingsford Co.	KGFX	added 4/80; 1/94-7/2000
The La Salle and Bureau County R.R. Co.	LSBC	1/75-1/80
The Lake Asphalt and Petroleum Co. of Pennsylvania	LPAX	1/52-7/65
The Lake Erie & Northern Ry. Co.	LEN	1/75-7/2000
The Lake Front Dock & R.R. Terminal Co.	LDRT	1/75-1/94
The Logansport & Eel River R.R. Museum, Inc.	LER	eliminated 10/89
The Logansport & Eel River Short-Line Co., Inc.	LER	added 10/89; eliminated 7/92; 1/94-7/2000
The Long Island Rail Road Co.	LI	1/75-1/94; eliminated 1/98; 7/2000
The Long-Bell Lumber Co.	LBX	4/38-1/52
The Longhorn R.R.	LHRR	added 10/97; 7/2000
The Longhorn R.R., a Division of Central of Tennessee Ry. & Navigation Co.	LHRR	eliminated 10/2000
The Lorain & West Virginia Ry. Co.	LAWV	1/75-1/80
The Louisiana & Pine Bluff Ry. Co.	LPB	Jan-75
The Louisiana and North West R.R. Co.	LNW	1/75-7/2000
The Lowville and Beaver River R.R. Co.	LBR	1/75-7/2000
The Mahoning Valley Ry. Co.	MVRY	added 4/82; 1/94-7/2000
The Mars Co.	TMCX	Apr-38
The Massena Terminal R.R. Co.	MSTR	1/75; eliminated 1/79; 1/80-1/94; eliminated 4/97; 7/2000
The Mathieson Alkali Works (Inc.)	MAWX	Apr-38
The Maxson Corp.	TMCX	1/75; eliminated 1/78
The Mead Corporation	MCX	4/38-1/52
The Midland Terminal Co.	MDLR	added 10/83; 1/94-7/2000
The Milwaukee Road	MILW	eliminated 4/86
The Minnesota Transfer Ry. Co.	MTFR	1/75-1/80
The Mississippian Ry. Cooperative, Inc.	MISS	added 1/87; 1/94-7/2000
The Mississippian Ry., Inc.	MISS