A library system allows users to sign up for accounts. After logging in,   users can borrow books, show their account debt, or display available books. Books are   organized under different genres/sub-genres. The system allows displaying all books or   books under a selected genre or using a combined criteria (e.g. books by a specific   author under a specific genre). Administrative accounts are allowed to add/edit/remove   books. The library may also provide book recommendations to users based on their   previous reading history

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Linux

An operating system (OS) is the software which manages hardware and resources, like CPU, storage and memory. The OS bridges the applications and hardware and makes the connections between all of your software and the hardware resources.