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History of Operating Systems

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Ch. 3 – Operating Systems CS 1 Introduction to Computers and Computer Technology Rick Graziani Spring 2009
Software
Software ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Operating System Software ,[object Object]
What is an operating system (OS)? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What is an operating system (OS)?
The User’s View
 
What “is” an operating system? ,[object Object],[object Object],[object Object],[object Object]
The kernel ,[object Object],[object Object],[object Object],[object Object],[object Object]
Kernel ,[object Object],[object Object],[object Object],[object Object],[object Object]
The functions of an operating system ,[object Object],[object Object],[object Object],[object Object]
1. Manages and Interacts with Computer Hardware ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
1. Manages and Interacts with Computer Hardware (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
1. Manages and Interacts with Computer Hardware (continued) ,[object Object],[object Object],[object Object]
Preemptive Multitasking vs Cooperative Multitasking ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],Multiprocessing with Multiple CPU’s
Processes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
Processes ,[object Object],[object Object],[object Object]
Multiuser Operating Systems ,[object Object],[object Object],[object Object],[object Object],[object Object]
Examples of Multiuser Operating Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Advantages/Disadvantages of Multiuser Operating Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Virtual Memory ,[object Object],[object Object],[object Object],[object Object]
Virtual Memory
2. Provides and Manages System Security ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3. Provides the System Interface ,[object Object],[object Object],[object Object],[object Object]
Command Line Interface DOS, UNIX, others
DOS plus Windows 3.1
Windows 95
Windows XP
Macintosh
Mac OS X
UNIX with X-Windows
Microsoft Vista
4. Provides the Interface for Application Software ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
4. Provides the Interface for Application Software (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Compatibility ,[object Object],[object Object],[object Object],[object Object],[object Object]
Order of Development ,[object Object],[object Object],[object Object],[object Object]
History of Operating Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
History of Operating Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
History of Operating Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
History of Operating Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Today’s Operating Systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Ch. 3 – Operating Systems CS 1 Introduction to Computers and Computer Technology Rick Graziani Spring 2009

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Cs1 3-operating systems