What does SIO stand for?
SIO stands for Social Improvement Organization
This definition appears very rarely and is found in the following Acronym Finder categories:
- Organizations, NGOs, schools, universities, etc.
See other definitions of SIO
We have 98 other meanings of SIO in our Acronym Attic
- serious inquiries only
- Service Information Octet (SS7)
- Service Inventory Optimization (software)
- Services in Operation
- Shanghai Informatization Office
- Ship's Information Officer (US Navy)
- Simultaneous Input Output
- Skidaway Institute of Oceanography
- Slave Input/Output
- Smart Input/Output (part of TEDS from IEEE standard 1451.1)