| IRTP | International Review of Theory & Practice (psychology & criminal justice) | 理论和实践的国际检讨(心理学和刑事司法) |
| IRTP | Internal Revenue Tax Paid | 已付国内收入税 |
| IRTP | International Reference Test Procedure | 国际参考试验程序 |
| IRTP | Integrated Reliability Test Program | 综合可靠性测试程序 |
| IRTP | Internet Reliable Transaction Protocol | Internet可靠事务协议 |
| IRTP | Intensive Remedial Teaching Programme (Hong Kong) | 强化补救教学计划（中国香港） |
| IRTP | Initial Recruiting and Training Plan | 初期征兵和训练计划 |
| IRTP | International Rice Testing Programme | 国际水稻试验计划 |
| IRTP | Graphics (Graphicon-2000 Interactive Real-Time PHIGS) | 图形（Graphicon-2000交互式实时PHIGS） |