Android
/ˈæn.dɹɔɪd/
n. — "Linux-based mobile OS enabling sideloading chaos across hardware buffet."
Android runs on modified Linux kernel with layered architecture (Kernel→HAL→Native Libraries→ART→Framework→Apps) powering 70%+ global smartphones via Google-led AOSP plus manufacturer skins. Unlike iOS's walled garden, Android supports sideloading, diverse SoCs (GPUs from ARM/Mali/Adreno), and Google Play Services for cloud sync while OEMs fragment versions/security patches across device zoo.
iOS
/ˌaɪ oʊ ˈɛs/
n. — "Apple's walled-garden mobile OS mocking Android's app bazaar."
Linux
/ˈlɪnʊks/
n. “An operating system that refuses to be owned.”
Linux is a family of open-source operating systems built around the Linux kernel, first released by Linus Torvalds in 1991. It forms the foundation of everything from servers and supercomputers to smartphones, routers, embedded devices, and developer laptops quietly running under desks worldwide.