Operating Systems Lecture1 - Introduction Golestan University Hossein Momeni
[email protected] Outline What is an operating system? Operating systems history Operating system concepts System calls Operating system structure User interface to the operating system Anatomy of a system call 2 Operating Systems Course- By: Hossein Momeni Samples of Operating Systems IBSYS (IBM 7090) MACH OS/360 (IBM 360) Apollo DOMAIN TSS/360 (360 mod 67) Unix (System V & BSD) Michigan Terminal System Apple Mac (v. 1– v. 9) CP/CMS & VM 370 MS-DOS MULTICS (GE 645) Windows NT, 2000, XP, 7 Alto (Xerox PARC) Novell Netware Pilot (Xerox STAR) CP/M Linux IRIX FreeBSD Solaris PalmOS MVS PocketPC VxWorks VxWorks 3 Operating Systems Course- By: Hossein Momeni Samples of Operating Systems (continue…) 4 Operating Systems Course- By: Hossein Momeni What is an Operating System? An Operating System is a program that acts as an intermediary/interface between a user of a computer and the computer hardware. It is an extended machine Hides the messy details which must be performed Presents user with a virtual machine, easier to use It is a resource manager Each program gets time with the resource Each program gets space on the resource 5 Operating Systems Course- By: Hossein Momeni Static View of System Components User 1 User 2 User 3 User 4 … User n Compiler Editor Database Calculator WP Operating System Hardware 6 Operating Systems Course- By: Hossein Momeni Dynamic View of System Components 7 Operating Systems Course- By: Hossein Momeni