| Rank | Abbreviation | Meaning |
|---|
| ***** | HWAC | Hard Wire And Cable
| |
| ***** | HWAC | Health Workforce Advisory Committee
| |
| **** | HWAC | Huntington Woods Aquatic Club
| |
| **** | HWAC | Home Warranty Association of California
| |
| **** | HWAC | HHS Wide Acquisition Contracts
| |
| **** | HWAC | Herbert W. Armstrong College
| |
| **** | HWAC | Hazardous Waste Advisory Committee
| |
| **** | HWAC | Horse Welfare Alliance of Canada
| |
| **** | HWAC | Houston World Affairs Council
| |
| *** | HWAC | Heating, Water, Air, Cooling
| |
| *** | HWAC | Hazardous Waste Action Coalition
| |
| *** | HWAC | Hand Workshop Art Center
| |
| *** | HWAC | Health, Wellness, and Athletic Center
| |
| ** | HWAC | Hazardous Waste Action Council
| |
| ** | HWAC | Healthy Weight Awareness Campaign
| |
| * | HWAC | Helen Woodward Animal Center
| |
| * | HWAC | Health Wellness Athletic Complex
| |
| * | HWAC | Hispanic White Alone or in Combination
| |
| * | HWAC | Hercules Wimbledon Athletic Club
| |
| * | HWAC | Helen Woodward Animal Center's
| |
| * | HWAC | Hylebos Watershed Action Committee
| |
| * | HWAC | Halifax Wavecutters Aquatic Club
| |
| * | HWAC | Horse Webbers Against Cruelty
| |
| * | HWAC | Health Wellness Advisory Committee
| |
| * | HWAC | Hamel Waxler Allen & Collins
| |