The meaning of the Acronym OI is...

OI is

• Opportunistic Infection
• Osteogenesis Imperfecta
• Orthopedically Impaired

More Meanings For OI:

• Object Interface
• Online Innovation
• Opto Isolator
• Optimum Interpolation
• Object Integration
• Outram Institute
• Office International
• Other Identification
• Ordinal Indicator
• Origin Independent
• Orthostatic Intolerance
• Operations Information
• October Introduction
• Optical Isolator
• Online Injection

OI is also in:

• Electronics
• General
• Ocean Science
• Unfiled