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
P& P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 PA PB PC PD PE PF PG PH PI PJ PK PL PM PN PO PP PQ PR PS PT PU PV PW PX PY PZ
PCA PCB PCC PCD PCE PCF PCG PCH PCI PCJ PCK PCL PCM PCN PCO PCP PCQ PCR PCS PCT PCU PCV PCW PCX PCY PCZ
PCAE PCAF PCAG PCAI PCAK PCAL PCAM PCAN PCAO PCAP PCAR PCAS PCAT PCAU PCAV PCAX PCAY PCAZ
1 PCAX Pioneer Chlor Alkali Co., Inc. added 1/1991; 1/1994; eliminated 7/1994; added 10/1996; 7/2000; eliminated 4/2001; 7/2005 (not listed)   NAKINA
2 PCAX Pioneer Chlor Alkali Co., Inc. added 1/91; 1/94; eliminated 7/94; added 10/96; 7/2000; eliminated 4/2001   NRHS
3 PCAX PIONEER CHLOR ALKALI COMPANY, INC.     PWRC
4 PCAX Pioneer Chlor Alkali     RSRV
5 PCAX PIONEER CHLOR ALKALI COMPANY, INC.     SCAC4