Ordered Call Back (Or Off-Called Back). An operator who has been directed to work on his/her day off. OCBs are called only after the regular work force and the volunteers have been used.
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OCC
Operations Control Center
OCI
Operations Central Instruction in El Monte, adjacent to Division 9. This unit conducts basic vehicle operations training for bus operators, mechanics and maintenance assistants; and licensing/certification compliance services.
OCIP
Owner-controlled insurance program
OCS
Overhead Cantenary System
OCTA
Orange County Transit Authority