Operational Navigation Chart
Open Network Computing
Operational Navigation Charts
Office of the National Coordinator
Off-Net Calling
oncogene
Oncology
Operational Navigational Chart
Occurrence Notification Center
Office National de la Chasse
Office of Narcotics Coordinator
Office of the National Coordinator for…
oncofetal
Onconase
ONMS Node Commander
open network communication
Open Networking Computing
Operation Navigation Chart
Operational Navigational Charts
Operator Network Center
Operator Network Console
optic nerve crush
Ordinary National Certificate
Organic Network Committee
Orthopaedic Nurse Certified
Orthopaedic Nursing Certificate
Orthopedic Nurse Certified
over-the-needle catheter