| Acronym | Definition |
|---|
| YMS | Yahoo Merchant Solutions |
| YMS | Yahoo Messenger |
| YMS | Young Micros Systems |
| YMS | Yardley-Makefield Soccer (Pennsylvania) |
| YMS | Yard Management System (system for managing container terminal yards) |
| YMS | Yield Management System |
| YMS | York Middle School |
| YMS | Young Men's Survey |
| YMS | Youngsville Middle School (Louisiana) |
| YMS | Ynnä Muuta Sellaista (Finnish: And such like) |
| YMS | Yamaha Music Schools |
| YMS | Young Musicians Society |
| YMS | Yard Management Software |
| YMS | Young Members' Section (Institution of Engineering and Technology, Hong Kong) |
| YMS | Yosemite Mountaineering School (California) |
| YMS | Ysterplaat Medical Supplies |
| YMS | Yorktown Middle School (Indiana) |
| YMS | Yard Mine Sweeper |
| YMS | District Motor Mine Sweeper (US Navy) |
| YMS | Yurimaguas Airport (Peru) |
| YMS | Yorkville Middle School (Illinois) |
| YMS | Yield Management Solutions (magazine) |
| YMS | Young Men's Shop |
| YMS | Yale Medical School |
| YMS | Yokosuka Middle School (Japan) |
| YMS | Young Muslim Secretariat |
| YMS | York Merchandising Systems |
| YMS | Yatton Music Society (UK) |
| YMS | Yerger Middle School (Arkansas) |
| YMS | Yard Class Minesweeper |
| YMS | Young Marine Scientists (Program) |
| YMS | York Med Systems, Inc (Ontario) |
| YMS | Younger People Affected by MS |
| YMS | Yacht Management System |
| YMS | Yoke Mounted Switch |
| YMS | Young Musicians' Summer Festival (Brigham Young University School of Music) |
| YMS | Youth Marketing Summit |
| YMS | Youngsville Middle Library (Louisiana) |
| YMS | Yrkesmiljøsenterets (Norway) |
| YMS | Yardley Management Solutions, Inc |