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
PQA PQB PQC PQE PQF PQI PQK PQL PQM PQN PQO PQR PQS PQT PQU PQX
1 PQX The PQ Corp added 4/1980; 1/1994-7/2005   NAKINA
2 PQX PQ Corp added 4/1978; 1/1980; eliminated 4/1980   NAKINA
3 PQX Philadelphia Quartz Co. 8/1920; 7/1930-1/1975; eliminated 4/1978   NAKINA
4 PQX Philadelphia Quartz Co. 4/38-1/75; eliminated 4/78   NRHS
5 PQX PQ Corp added 4/78; 1/80; eliminated 4/80   NRHS
6 PQX The PQ Corp added 4/80; 1/94-7/2000   NRHS
7 PQX PQ CORPORATION [PHILADELPHIA QUARTZ CO.]     PWRC
8 PQX PQ Corporation     RSRV
9 PQX PQ CORPORATION     SCAC4