Real world company prefixes

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M n O P Q R S T U V W X Y Z Ø
S& S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 SA SB SC SD SE SF SG SH SI SJ SK SL SM SN SO SP SQ SR SS ST SU SV SW SX SY SZ
SDA SDB SDC SDD SDE SDF SDG SDH SDI SDJ SDK SDL SDM SDN SDO SDP SDQ SDR SDS SDT SDU SDV SDW SDX SDY SDZ
SDID SDIF SDIG SDIH SDIK SDIM SDIQ SDIS SDIT SDIV SDIW SDIX SDIY
1 SDIX Smith-Douglass Co., Inc. 4/1947-7/1954; eliminated 4/1957   NAKINA
2 SDIX Steel Dynamics, Inc. 7/2005 (not listed)   NAKINA
3 SDIX Smith-Douglass Co., Inc. 1/52; eliminated 4/57   NRHS
4 SDIX *SMITH-DOUGLAS CO., INC.     PWRC
5 SDIX *SOUTH DAKOTA & IOWA RAILROAD     PWRC
6 SDIX +STEEL DYNAMICS, INC.     PWRC
7 SDIX STEEL DYNAMICS INC     SCAC4