| HALO | Housing And Assisted Living Options | 住房和辅助生活选项 |
| HALO | Home And Lot Owners | 住宅和地块所有者 |
| HALO | High Altitude Long Operation | 高空长距离作业 |
| HALO | Ham And Lettuce Ouch | 火腿生菜汁 |
| HALO | High Altitude Long Operating (Angel Technologies) | 高空长距离作业（天使技术） |
| HALO | High Altitude Observatory | 高空天文台 |
| HALO | Healthy Alternatives for Little Ones | 小宝宝的健康选择 |
| HALO | Hematopoietic/Hemotoxicity Assays Via Luminescence Output (HemoGenix) | Hemotoxicity造血/输出(HemoGenix通过发光测定) |
| HALO | Hypersonic Aircraft Launch Option | 高超音速飞机发射选项 |
| HALO | Hispanic American Leadership Organization (student organization) | 西班牙裔美国人领导组织（学生组织） |
| HALO | High Altitude Low Observable | 高空低能见度 |
| HALO | High Amount Lock Out (stocks) | 大额锁定（库存） |
| HALO | Highly Advanced Loader Operations (paintball) | 高度先进的装载机操作（彩弹） |
| HALO | High Altitude Large Optics | 高空大型光学设备 |
| HALO | High Availability Load Optimizing (web hosting) | 高可用性负载优化（web托管） |
| HALO | High Altitude Low Opening (parachuting) | 高空低开（跳伞） |
| HALO | High Altitude Low Orbit (game) | 高空低轨道（游戏） |
| HALO | High Altitude Low Opening | 高投低开空投 |
| HALO | Hazardous Area Life-Support Organization (Humanitarian aid organization and trust fund) | 危险地区生命支持组织（人道主义援助组织和信托基金） |
| HALO | High Altitude Low Open | 高空低开 |
| HALO | Hostile Artillery Locator (BAE Systems) | 敌对炮兵定位系统（BAE Systems） |
| HALO | Hospital Affiliated Lobbyist Organization | 医院附属游说组织 |
| HALO | Halation (cinematography) | 暂停（电影） |
| HALO | Husker Angels Loving Others | 骗子天使爱别人 |