理工 (lǐgōng) means "science and engineering" and is short for 理科 (science) and 工科 (engineering). It commonly appears in the names of universities and academic institutions, such as 理工学院 (institute of technology) or 理工大学 (university of technology).
他毕业于北京理工大学,学的是计算机。
Tā bìyè yú Běijīng Lǐgōng Dàxué, xué de shì jìsuànjī.
He graduated from Beijing Institute of Technology, majoring in computer science.
理工科的学生也应该多读一些文学作品。
Lǐgōngkē de xuéshēng yě yīnggāi duō dú yīxiē wénxué zuòpǐn.
Students of science and engineering should also read more literary works.
这所理工学院最近新开了人工智能专业。
Zhè suǒ lǐgōng xuéyuàn zuìjìn xīn kāi le réngōng zhìnéng zhuānyè.
This institute of technology recently opened a new major in artificial intelligence.