निम्नलिखित में से कौन सा ऑपरेटिंग सिस्टम एक ही कंप्यूटर सिस्टम पर एक साथ कई उपयोगकर्ताओं को काम करने की सुविधा प्रदान करता है?

Which service of an operating system manages the allocation of hardware resources such as main memory, CPU cycles, and file storage to different users or tasks in a multi-user environment?

Identify the operating system from the following options that is primarily designed for mobile devices rather than standard desktop computers or laptops.