| CYI | Can You Imagine
| Others |
| CYI | Cape York Institute
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| CYI | Celebrate Your Independents
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| CYI | Certified Yoga Instructor
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| CYI | Check Your Inbox!
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| CYI | Chiayi, Taiwan China
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| CYI | Children and Youth International
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| CYI | China Yuchai International
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| CYI | Chinatown Youth Initiatives
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| CYI | Chinese Youth Initiative
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| CYI | Christ for Youth International
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| CYI | Christian Youth Initiative
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| CYI | Climate Youth Initiative
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| CYI | Coatesville Youth Initiative
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| CYI | Congo Yetu Initiative
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| CYI | Connecting Youth Initiative
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| CYI | Coordinated Youth Initiative
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| CYI | Council for Yukon Indians
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| CYI | Creative Youth Initiative
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| CYI | Crivitz Youth Inc
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| CYI | Current Year Income
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| CYI | Cyber Incident
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