| Wolseley PLC, American Depositary Receipts | Business |
| Western Office Systems | Business |
| Wolseley | Business |
| Wholly Owned Subsidiary | Business |
| Washing Oil Supply | Chemistry |
| War Of Souls | Community |
| Well Of Souls | Community |
| World Of Smiles | Community |
| Working On Song | Community |
| Windows Operating System | Computing |
| Workstation Operation System | Computing |
| Web Object Service | Computing |
| Wireless Office Systems | Computing |
| Workplace Operating System | Computing |
| Web Of Science | Computing |
| Wall Of Shame | General |
| World Of Sprindfield | General |
| Worshipers Of Shampoo | General |
| World of Spectrum | General |
| William O Schaefer | General |
| Waffle on a Stick | General |
| Write Optimized System | General |
| Waste Of Space | General |
| Workplace Outcomes Suite | General |
| Workplace Outcome Suite | General |
| Wilson Otsuki Sewadeh | General |
| Object Storage | General |
| Write Optimized Store | General |
| World Of Speed | General |
| Whole Of Syria | Governmental |
| Warrant Officer's Steward | Governmental |
| Workforce Opportunity Services | Governmental |
| Workforce Outsource Services | Governmental |
| Weapons of Sorrow | Governmental |
| Washington Ornithological Society | Medical |
| Wilson Ornithological Society | Medical |
| Wartime Operational State | Military and Defence |
| Web Operation System | Softwares |
| World of Sport | Sports |
| Wireless Optimization Service | Telecommunication |
