id	definition
1S	Side One
2S	Side Two
A1	Single
AL	All
AO	Single End Overhang
AS	Siding
B1	Bolster
BC	Back of Cab
BI	Bilateral
BK	Rear
BL	Block
BR	Brick
BS	Both Sides
BT	Bottom
CH	Casing Head Flange
CT	Center
DO	Double End Overhang
DT	Downstream Tap
DU	Dual Fuel Tank Position
EX	Exterior
FR	Front
FS	Front Spare
GF	Rig Floor
IN	Inside
IT	Interior
KB	Kelly Bushing
LC	Less Critical Surface
LO	Lower
LT	Left
M1	Multiple
MC	More Critical Surface
MD	Middle
NS	Not Specified
NT	Next Relative Position
OA	Overall
OS	One Side
OT	Outside
R0	Relative Position 10
R1	Relative Position 1
R2	Relative Position 2
R3	Relative Position 3
R4	Relative Position 4
R5	Relative Position 5
R6	Relative Position 6
R7	Relative Position 7
R8	Relative Position 8
R9	Relative Position 9
RA	Relative Position 11
RB	Relative Position 12
RC	Relative Position 13
RD	Relative Position 14
RE	Relative Position 15
RF	Relative Position 16
RG	Relative Position 17
RH	Relative Position 18
RI	Relative Position 19
RJ	Relative Position 20
RK	Relative Position 21
RL	Relative Position 22
RM	Relative Position 23
RN	Relative Position 24
RO	Relative Position 25
RP	Relative Position 26
RQ	Relative Position 27
RR	Relative Position 28
RS	Relative Position 29
RT	Relative Position 30
RU	Relative Position 31
RV	Relative Position 32
RW	Relative Position 33
RX	Relative Position 34
RY	Relative Position 35
RZ	Relative Position 36
S1	Relative Position 37
S2	Relative Position 38
S3	Relative Position 39
S4	Relative Position 40
S5	Relative Position 41
S6	Relative Position 42
S7	Relative Position 43
S8	Relative Position 44
S9	Relative Position 45
SA	Relative Position 46
SB	Right
SC	Relative Position 47
SD	Relative Position 48
SE	Relative Position 49
SF	Relative Position 50
SN	Stone
SP	Spare Tire Position
SS	Rear Spare
ST	Stucco
SU	Sub-sea
TB	Tank Bottom
TP	Top
TS	Two Sides
UC	Under Cab
UN	Unilateral
UP	Upper
UT	Upstream Tap
WF	Wood