| 1 | HOUA | HOUSE, ALLEN TRUCKING | | | SCAC4 |
| 2 | HOUB | HOUSE, BOB D | | | SCAC4 |
| 3 | HOUC | HOUG SPECIAL SERVICES INC | | | SCAC4 |
| 4 | HOUD | HOUDE, WILLIAM LTD | | | SCAC4 |
| 5 | HOUF | HOUFF TRANSFER INC | | | PWRC |
| 6 | HOUG | HOUG LLC | | | SCAC4 |
| 7 | HOUH | HOUGH PETROLEUM CORP | | | SCAC4 |
| 8 | HOUI | HOTSHOT UNLIMITED | | | SCAC4 |
| 9 | HOUS | HOUSTON EXPRESS SERVICES | | | SCAC4 |
| 10 | HOUTRAN | Houston Transit Company | City: Houston | US-TX | TRAFFIC |
| 11 | HOUU | HARDING CONTAINERS INTERNATIONAL INC. | | USA | BIC |
| 12 | HOUV | HOOVER UNIVERSAL INC | | | SCAC4 |
| 13 | HOUX | PPG Industries, Inc. | 1/1975-1/1980 | | NAKINA |
| 14 | HOUX | Houston Chemical Corp. | added 10/1964; eliminated 7/1965; added 4/1966; 10/1966-4/1970; eliminated 4/1971 | | NAKINA |
| 15 | HOUX | PPG Industries, Inc. | 1/75-1/80 | | NRHS |
| 16 | HOUX | Houston Chemical Corp. | eliminated 7/65; added 4/66; 10/66-4/70; eliminated 4/71 | | NRHS |
| 17 | HOUX | PPG INDUSTRIES, INC. [HOUSTON CHEMICAL CORP.] | | | PWRC |
