| Company | Category | Area | Address | Web | E-mail | Contact person |
| OCA TECHNOLOGIES INC | business consulting services | Texas | 6239 WIGTON DR, HOUSTON, Harris, Texas, 77096-4623, USA |
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Arthur O Connor |
| OCA TRAVEL INC | Travel Agencies & Bureaus | New York | 1411 BONNIE LN, FLUSHING, Queens, New York, 11360-1144, USA |
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| OCA UNLIMITED | Unclassified | Georgia | 4118 SIOUX WAY, STONE MTN, De Kalb, Georgia, 30083-5234, USA |
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Paul Golassi |
| OCA VENTURES | Investment Advice | Illinois | 141 W JACKSON BLVD # 39, CHICAGO, Cook, Illinois, 60604-2929, USA |
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JIM DUGAN |
