| Acronym | Definition |
|---|
| WWI | World War I |
| WWI | Whistling Woods International (India) |
| WWI | What Was It? |
| WWI | Web Wordnet Interface |
| WWI | Worldwatch Institute (Washington, DC) |
| WWI | Weight Watchers International |
| WWI | Women for Women International |
| WWI | Washington Wine Institute (Olympia, WA) |
| WWI | Wireless World Initiative |
| WWI | World Wide Images (database) |
| WWI | Walking While Intoxicated |
| WWI | WinStar Wireless, Inc. (Winstar Communications, Inc.) |
| WWI | WhiteWater Inc (Charlton, MA) |
| WWI | Wesleyan Women International |
| WWI | World Wings International, Inc (former Pan Am flight attendants) |
| WWI | Wireless and Wireline Initiative (Sprint & Sprint PCS) |