Operating systems Basics
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Operating systems Basics

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Operating systems Basics

Operating systems Basics

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  • 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
  • 22. 22
  • 23. 23