| ITSP | Internet Telephony Service Provider | IP电话业务提供商 |
| ITSP | Information Technology Strategic Plan | 信息技术战略计划 |
| ITSP | Internet Telephone Service Provider | 互联网电话服务提供商 |
| ITSP | Interregional Transportation Strategic Plan (California) | 区域间运输战略计划（加利福尼亚州） |
| ITSP | Information Technology Services Program | 信息技术服务计划 |
| ITSP | Integrated Training Systems Plan | 综合训练系统计划 |
| ITSP | Information Technology Strategy Planning | 信息技术战略规划 |
| ITSP | Interstate Transportation of Stolen Property | 被盗财产的州际运输 |