| Acronym | Definition |
|---|
| WTO | World Tourism Organization |
| WTO | World Trade Organization (now the United Nations World Trade Organization, UNWTO) |
| WTO | World Trade Organization |
| WTO | We're Taking Over (gaming clan) |
| WTO | Warsaw Treaty Organization |
| WTO | World Toilet Organisation |
| WTO | Winning the Oil Endgame (ebook by Rocky Mountain Institute) |
| WTO | Weltweit Taube Ohren (German: Worldwide Deaf Ears) |
| WTO | Write To Operator |
| WTO | Way Too Old |
| WTO | Wraith: the Oblivion (game) |
| WTO | Weapons Training Officer |
| WTO | World Telecommunications Organization |
| WTO | Windows Technical Operations |