The meaning of the Acronym OIO is...

OIO is

• Onderzoeker In Opleiding (PhD student; Research worker in training)

More Meanings For OIO:

• Object Input/ Output
• Open Infrastructure For Outcomes
• Onderzoeker In Opleiding (PhD student; Research worker in training)
• Office Inventory Ordering
• Opportunities In Options
• Office Of The Insurance Ombudsman

OIO is also in:

• General
• State and Local
• Stock Exchange
• Universities