Operating system:
it is a collection of software consisting of control routine that co-ordinate
hardware activity. It is a term used to describe a collection of program
modules that supervises the operation and use of all system resources to ensure
their efficient and judicious management. It is a unit of program which takes
over the operation of the computer to the extent of being able to allow a
number of .program to be run on the computer with little or no human
intervention.
Importance of operating system
1.
It moderates the relationship between the computer and
its peripherals
2.
It helps in the management of files,- copying,
deleting, moving of files from one storage location to the other.
3.
It encourages the memory for its efficient usage and
thus adding the speed of the computer.
4.
It manages the activities of the processor in terms of
job execution according to the priority of arrival ,of jobs
5.
It informs the user of nay hardware or software error
6.
It makes communication between the computer and the
user or the operator possible.
Types
of operating system
i.
Single user operating system
ii.
Multiple user operating system
Examples of Application Software
are:
·
Word Processor e.g. Microsoft word, word
perfect, Word star etc
·
Graphical/ desktop packages e.g. Microsoft
publisher, paintbrush, Corel draw, Ms Power point, PageMaker etc.
·
Database packages e.g. Dbase iii &iv etc
·
Spread sheet packages e.g. Ms Excel, etc
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