| Acronym | Definition |
|---|
| YES | Youth Employment Service (Canada) |
| YES | Yamaha Education Suite |
| YES | Yankees Entertainment & Sports |
| YES | Young Epidemiology Scholars |
| YES | Youth Enrichment Services (Boston, MA) |
| YES | Youth Employment Strategy (Canada) |
| Yes | Youth Engaged in Service |
| YES | Youth Emergency Services |
| YES | Youth Education Series (Disney Institute Youth Programs) |
| YES | Youth for Environmental Sanity |
| YES | Youth Empowerment Summit |
| YES | Yale Entrepreneurial Society (Yale University; New Haven, CT) |
| YES | Youth Enhancement Services |
| YES | Young Entrepreneurs for Europe |
| YES | Young Engineers Sportscar (automobile) |
| YES | Youth Engineering and Science |
| YES | Youth Environmental Summit (Youth Environmental Coalition) |
| YES | Youth and Education Services |
| YES | Youth Education Scholarship |
| YES | Youth Exchange Scheme (UK) |
| YES | Youth Employment Start |
| YES | Youth Evangelism Service |
| YES | Youth Engaged in Science (Woodstock, GA) |
| YES | Yellowstone Ecosystem Studies |
| YES | Youth Entrepreneurial Success |
| YES | Youth Entrepreneurship Strategy (Smile Africa International) |
| YES | Youth Elderly Service |
| YES | Youth Entrepreneurs Society (Egypt) |
| YES | Youth Exchanging with Seniors (FCCLA) |
| YES | Yellowstone Electronic Solutions Company |
| YES | Youth and Environment Society (Bahrain) |
| YES | Yamada English Services (Tokyo, Japan) |
| YES | Yacht Escort Ships, International |
| YES | Youth Exchange and Study |
| YES | Youth Employment Solutions (Detroit, MI) |
| YES | Young Enterprise Scheme (various organizations) |