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Distributed Operating System: In this operating system processing is carried independently in more than
one location but with sharing of computational capacity. It is accessed by a set of computers interconnected
by a network. It gives an impression to the user that he is working on a single system.
Real-Time Operating System: It processes instructions and produces a response within a specified time.
It is a computing environment that reacts to input within specified time. xample: M tra c signal etc.
FUNCTIONS OF OPERATING SYSTEM
he operating system performs the following functions in a device which are given the following:
Device Management: t the time of execution of any program operating system directly controls the
operation of the input-output I O devices like controlling the action of the printer - OM drives etc.
Process Management: Operating system handles the scheduling synchronisation processing suspension and
resumption of processes. Operating system can independently prioritise obs for processing.
Memory Management: It is the process of coordinating and controlling the use of memory in a computer
system. It allocates a ob to a free memory partition.
Security Management: Operating system protects information and resources against unauthorised access
using login and password.
File Management: Operating system performs the function of retrieving, storing, renaming and protecting
files.
User Interface: he operating system provides an interface to the user to access the applications so that the
user can easily access and use the software. It acts as an interface between the user and the hardware.
TYPES OF OPERATING SYSTEM
here are various types of operating systems. Some popular operating systems are:
isk Operating System OS nix
Solaris Microsoft indows
inux M acintosh Operating System
Mobile Operating Systems ndroid Symbian i en
Disk Operating System (DOS)
fter NI OS is one of the most commonly used Operating Systems. It was written originally by im
atterson Father of OS and owned by Seattle omputer roducts. Microsoft released it with an I M as
MS- OS . in . It has the following important features:
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