it for managers 7
TRANSCRIPT
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Session 7
By
Prof. Arun Mishra
Email: [email protected]
Mob.: 9893686820
Information Technologyfor Managers
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Learning Objectives
In this Session you will learn:
What is Operating System?
Types of OS
Functions of OS
What is Data Communication? Basic Components of Data Communication
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What is an Operating System?
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Primary Objectives of an OperatingSystem?
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5
Layers of Computer System
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Main Functions of an Operating System
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Main Functions of an Operating System
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Types of Operating Systems
Real-time operating system
Very fast small OS Built into a device
Respond quickly to user input
MP3 players, Medical devices
Single user/Single tasking OS
One user works on the system
Performs one task at a time
MS-DOS and Palm OS
Take up little space on disk
Run on inexpensive computers
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Types of Operating Systems
Single user/Multitasking OS
User performs many tasks at once Most common form of OS
Windows XP, Windows 7
Require expensive computers
Tend to be complex
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Types of Operating Systems
Multi user/Multitasking OS
Many users connect to one computer Each user has a unique session
UNIX, Linux, and VMS
Maintenance can be easy
Requires a powerful computer
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Multi user/Multi tasking OS
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User Interface
Graphical user interface (GUI)
Most common interface Windows, OS X, Gnome, KDE
Uses a mouse to control objects
Uses a desktop platform
Shortcuts open programs or documents Task switching
Dialog boxes allow directed input
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Graphical User Interface
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User Interface
Command line interfaces
Older interface DOS, UNIX
User types commands at a prompt
User must remember all commands
Included in all GUIs
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Command Line Interface
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DATA COMMUNICATIONS
Is the exchange of data between two
devices via some form of transmissionmedium such as a wire cable.
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1. Delivery. The system must deliver data to
the correct destination.2. Accuracy. The system must deliver the
data accurately
3. Timeliness. The system must deliver data
in a timely manner.
FUNDAMENTAL CHARACTERISTICS:
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COMPONENTS OF COMMUNICATION
1. Message. Is the information (data) to be
communicated.
2. Sender. Is the device that sends the data
message.
3. Receiver. Is the device that receives the
message.
4. Medium. Is the physical path by which amessage travels from the sender to receiver.
5. Protocol. Is a set of rules that govern datacommunications. It represents an agreement
between the communicating devices.
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COMPON
EN
TS OF COMMUN
ICATION
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ANY QUESTIONS?
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