Operating Systems
characteristics
Multithreading
It allows different parts of a single program to run synchronously.
Multitasking
It allows more than one program to run simultaneously.
Multiprocessing
It supports running a program on more than one desktop.
Multi-user
It allows two or more users to work on a program at the same time.
It is the main software or set of programs of a computer system that manages hardware resources and provides services to software application programs
Real Time
It responds to input instantly.
Mobile Operating Systems
Android is a mobile operating system based on Linux kernel and other open source software.