What is operating system?
An Operating System (OS) is an interface between a computer user and computer hardware. It manages the computer's memory and processes, as well as all of its software and hardware. Without an operating system, a computer is useless.
What does an OS do?
It performs al the basic tasks like file management, memory management, process management, Device management, handling input and output, and controlling peripheral devices such as disk drives and printers etc...
Services of Operating System
- Program execution
- 1/O Operation
- File system manipulation
- Communication
- Error handling
- Resource Management
- Protection
Properties of Operating System
- Batch processing
- Multitasking
- Multiprogramming
- Interactivity
- Real Time System
- Distributed Environment
- Spooling
Different types of OS
- Batch Operating System
- Time-sharing operating systems
- Distributed operating System
- Network operating System
- Real Time operating System
Example operating systems
• Windows (GUI based, PC)
• GNU/Linux (Personal, Workstations, ISP, File and print server, Three-tier client/Server)
• macOS (Macintosh), used for Apple's personal computers and work stations (MacBook, iMac).
• Android (Google's Operating System for smartphones/tablets/smartwatches)
• iOS (Apple's OS for iPhone, iPad and iPod Touch)
