What is an Operating System?

An Operating System (OS) is system software that manages hardware resources and provides services for computer programs.

Functions of an OS

• Process management
• Memory management
• File system management
• Device management
• Security and access control

Types of OS

• Batch OS: Jobs are collected and processed in batches.
• Time-Sharing OS: Multiple users share CPU time.
• Real-Time OS: Guarantees response within a time constraint.
• Distributed OS: Manages a group of networked computers.
• Network OS: Provides networking features.