- Office of National Assessments, an Australian intelligence agency which provides all-source assessments on international political, strategic and economic developments to the Prime Minister and senior ministers in the National Security Committee of Cabinet.
- Original Net Animation, a Japanese anime uploaded directly onto the net.
ona - Computer Definition
(Open Network Architecture) An FCC plan that allows users and competing enhanced service providers (ESPs) equal access to unbundled, basic telephone services. The Open Network Provision (ONP) is the European counterpart.