WSD
- API
- Direct Stream Digital
- Wanganui School of Design
- Water Supplies Department
- Web Services for Devices
- Westminster School District
- Windham School District (Texas)
- Winnipeg School Division
- Wisconsin School for the Deaf
- Wissahickon School District
- Woodbridge School District
- Word-sense disambiguation
- World Speech Day
- World Statistics Day
- World Storytelling Day
- World Stroke Day