Operating systems Basics
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This document discusses computer operating systems. It defines an operating system as a collection of software that manages computer hardware resources and provides common services for computer programs. It notes that operating systems are necessary because without them, every program would need full hardware specifications and drivers to run correctly. The document then outlines the history of major operating systems from the 1950s to present day, including UNIX, Mac OS, Windows, Linux, Android and iOS. It also discusses the components of an operating system and how they have evolved from early command line interfaces to modern graphical user interfaces.
Operating systems Basics
- 1. Computer Operating Systems 180 Daraga ….. New Stage 6 Lecturer: Sherif Mousa Email: eng.sherif.mosa@gmail.com
- 2. 2 Feel Free To Ask @ Anytime
- 3. Computer Operating Systems Agenda • Definition • Why? • Components • History • Evolution • Types • Then What ? 3
- 4. Definition 4
- 5. Computer Operating Systems Definition • Operating System (OS) – A collection of software that manages computer hardware resources and provides common services for computer programs. 5 • Operating System (OS) – A collection of software that manages computer hardware resources and provides common services for computer programs.
- 6. Why? 6
- 7. Computer Operating Systems Why? • With NO OS – Every program needs the full hardware specification and drivers to run correctly. • OS main responsibilities – Manages computer resources. – Intermediate between user applications and hardware. 7
- 8. Computer Operating Systems OS Responsibilities 8 User Applications Hardware CPU RAM Display Keyboard Operating System
- 9. Components 9
- 10. Computer Operating Systems Components 10 User Applications Hardware CPU RAM Display Keyboard Operating System Operating System Boot Loader Kernel Device Drivers Networking Security User Interface User Applications
- 11. History 11
- 12. Computer Operating Systems History • 1950s & 1960s – LEO, IBM, MIT, Bell Labs • 1969 – UNIX (AT & T) – Ken Thompson, Dennis Ritchie 12
- 13. Computer Operating Systems History (cont’d) • 1980s – Mac OS 1984 (Apple) – Windows 1985 (Microsoft) • 1991 (Multi-Threaded) – GNU/Linux (FSF) • 2007 – Android (Google) • 2007 – iOS (Apple) 13
- 14. Evolution 14
- 15. Computer Operating Systems Evolution 15 Unix Terminal DOS Command Line First Mouse Design 1960s 1973 Xerox Alto PC MAC OS 1 , 1984Windows 1 , 1985
- 16. Computer Operating Systems Evolution (Today) 16
- 17. Computer Operating Systems Evolution (Android) 17
- 18. OS Types 18
- 19. Computer Operating Systems OS Types 19
- 20. Computer Operating Systems OS Types (PCs & Servers) 20
- 21. Then What ? 21
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