What are the types of mobile phone systems, how to distinguish them and what does Android mean? Please give me your advice.

At present, there are Android (Google's system is the most mainstream system on the market because of its great playability, many softwares, wide selection and free open source, and the so-called ophone, oms, Le os, Mihm and Dim Sum os are all its improved versions), Saipan (Nokia's used to be the mainstream, but now it is too old to abandon) and ios (Apple mobile phone). Windows mobile and windows ce (Microsoft's old system, which has been abandoned), windows phone (Microsoft's latest system, which is used to seize the market of Android and ios, is not very easy to use at this stage, but has a good prospect), bada (Samsung's self-made system, which is not easy to use, has been abandoned), web os (Hewlett-Packard Company is using it, and has now given up), Megoo (made by Nokia and inter, it seems not very good) Blackberry os (Blackberry company, famous for its strong business, reliability and security) was finally forgotten. linux, the mother of Android, used to be a system directly applied to mobile phones, hehe. I hope I can help you.