Real world company prefixes

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I& I2 I3 I4 I5 I6 I7 I8 I9 IA IB IC ID IE IF IG IH II IJ IK IL IM IN IO IP IQ IR IS IT IU IV IW IX IY IZ
ICA ICB ICC ICD ICE ICF ICG ICH ICI ICJ ICK ICL ICM ICN ICO ICP ICR ICS ICT ICU ICV ICW ICX ICY ICZ
ICAC ICAL ICAM ICAO ICAP ICAQ ICAR ICAT ICAU ICAX
1 ICAP HOLIDAY ON ICE     PWRC