From the back side of some NP wheel reports

Box		40'	50'	
DF XML XAP	BD	BF	
6/7' SD		B2	B1	
8' + SD		B4	B3	
Plug Dr		B6	B5	
DblDr		B8	B7	
> 50'		-	B9

Flats				
Bulkhd		F1
Bi LVL		F2
Tri LVL		F3
40-9'		F4		
50-9'		F5	
60' +		F6
TOFC		F7,F8
Artic		F9	
Contain		FC	
Spc Well Dep	FS	
Log		FL	
WOOD Chip	WC	

Gondola	40'	50'	60'>=	
MILL	G2	G1		
Drop	G4	G3		
60' +			G6	
Cov			GC	

Ore			H1	

Hoppers			Covered	Open
50T			C2	H2
70T			C3	H4
90T +			C6	H6
Hart			HS	

Refrigerators	40'	50'>=		
Reg		R2	R2		
Mech		R4	R3		
Insul RBL	R6	R5		
Bulk Potato		R8	
Pass			PR	

Stock				
40' Sing	S3			
40' Doub	S4			
Shut Pig Pla		S6	
Tank			TK	
Tank n0 tons		Tn

MOW			MW
MOW Flat		MF

Cabo			X
Cabo deadhead		XD