Unity Operating System (also known as Unified Operating System[2] or UOS, Chinese: 统一操作系统) is a Linux distribution developed by UnionTech (Chinese: 统信软件, Tǒngxìn) based on Deepin,[3] which is based on Debian.

It is used in China as part of a government initiative beginning in 2019 to replace foreign-made software such as Microsoft Windows with domestic products.

[3][9] The operating system is primarily aimed at the Chinese market and is intended to replace Microsoft Windows in the country by 2022,[10][11][12] also known as "3-5-2 policy".

[13] So far, the focus has therefore been primarily on in house hardware such as that from the semiconductor company Zhaoxin.

[2] It was reported on July 23, 2022 that the operating system could support HarmonyOS app file format, hap .app.