“OPERATING SYSTEM - ALL IN ONE” app provides an environment to learn and prepare in CONCEPT OF OPERATING SYSTEM from anywhere, at any time and beyond the limits. This "OPERATING SYSTEM - ALL IN ONE" is for all kinds of preparation like GATE, UNIVERSITY EXAM, COMPETITIVE EXAM. And especially for students of BE, Diploma, MCA, BCA students. This app is aimed to grow your knowledge and quick reference. An operating system (OS) is system software that manages computer hardware and software resource