Transcript System software

By : - Kushan Chathumal Jayasinghe
Wirajitha Wickramathilake
What is a Software?
 A software is a collection of programmes that
provide the instructions telling a computer what to
do.
What is a Application Software?
 Application software is a subclass of computer
software that employs the capabilities of a computer
directly and thoroughly to a task that the user wishes
to perform.
Software could be categorized as follows :
Types of Application Software:
 Retail software
 OEM software
 Shareware
 Crippleware
 Demo software
 Freeware
 Adware
 Spyware
 Public domain Software
Retail Software
• This
type of software
is sold offmanuals
the
• However,
when hard-copy
and
shelves
of retailare
stores.
It includes
instructions
not required,
a
expensive packaging designed to catch
downloadable
version
off
the
Internet
the eye of shoppers and, as such, is
will
be
less
expensive,
if
available.
generally more expensive. An advantage
of retail software is that it comes with
printed manuals and installation
instructions, missing in hard-copy form
from virtually every other category of
software.
OEM Software
Microsoft
sells
its operating
OEM
 OEM
stands
for "Original
Equipment
The
"manual"
consists
ofsystems
the Helpasmenu
software
at athe
reduced
minus
retail
Manufacturer"
and
refers price,
to itself.
software
sold
in bulk is
built into
software
OEM
software
to
resellers,
designed
toand
be bundled
withits original
packaging,
manuals
installation
not legal
to buy unbundled
from
hardware.
For example,
hasoperating
contracts
instructions.
Resellers
install the
hardware
system. Microsoft
with
various
companies
including
Dell
system
before
systems
are sold
and the
Computers,
Gateway
others.
OEM CD isToshiba,
supplied
to the and
buyer.
Shareware
shareware
incorporates
 Some
This software
is downloadable
froman
theinternal
Internet.
clock
thatdiffer,
disables
the program
afteristhe
trial
Licenses
but commonly
the user
allowed
to try the
program
for free,
for a period
stipulated
period
unless
a serial
number
is supplied.
in the license,
usually
thirty days.
At the
of the
Other
shareware
designs
continue
toend
work
trial "nag"
period,screens,
the software
must be purchased
with
encouraging
the userorto
uninstalled.
purchase
the program.
Crippleware
 This software is similar to shareware except that
key features will cease to work after the trial period
has ended. For example, the "save" function, the
print function, or some other vital feature
necessary to use the program effectively may
become unusable. This "cripples" the program.
Other types of crippleware incorporate crippled
functions throughout the trial period. A purchase
is necessary to unlock the crippled features.
Demo Software
 Demo software is not intended to be a
functioning program, though it may allow
partial functioning. It is mainly designed
to demonstrate what a purchased version is
capable of doing, and often works more like an
automated tutorial. If a person wants to use the
program, they must buy a fully functioning
version.
Freeware
 Freeware is also downloadable off the Internet
and free of charge. Often freeware is only free
for personal use, while commercial use requires
a paid license. Freeware does not contain
spyware or adware. If it is found to contain
either of these, it is reclassified as such.
Adware
 This is free software that is supported by
advertisements built into the program itself.
Some adware requires a live Internet feed and uses
constant bandwidth to upload new advertisements.
The user must view these ads in the interface of the
program. Disabling the ads is against the license
agreement. Adware is not particularly popular.
Spyware
This
can
be stored
stored
with
a be
unique
 Spyware
software iscan
normally
free, but
can
This information
information
be
with
a
unique
identification
tag
with
the
shareware.
It clandestinely
"phones
home"
and sends
identification
tag associated
associated
with
the specific
specific
program
user's
machine,
mapping
a
data
back toon
thea
the spyware,
most often
program
on
acreator
user's of
machine,
mapping
a oneonewithout
user's knowledge.
For example,
a
to-one
relationship.
The
of spyware
spyware
is
to-onethe
relationship.
The concept
concept
of
is
multimedia
player might
profileprograms
what music
anduse
very
and
that
very unpopular,
unpopular,
and many
many
programs
that
use
video
files the
softwarewere
is called
uponto
play. Other
spyware
protocols
forced
this
spyware
protocols
were
forced
totodisclose
disclose
this
spyware
programs
divulge
the protocols
in their
to
users
and
offer
a
means
to
turn
off
to users and offer a means to turn off reporting
reporting
licenses,
and make acceptance of the spyware feature
functions.
functions.
a condition of agreement for using the software.
Public domain Software
 This is free software, but unlike freeware, public
domain software does not have a
specific copyright owner or license restrictions. It is
the only software that can be legally modified by the
user for his or her own purposes.
 Utility
Systemsoftware,
software
is computer
software
designed
to operate
which
helps to
analyze,
configure,
optimize and
What
is
a
System
Software?
the computer
hardware and to provide and maintain a platform
maintain
the computer.
for running application software.
some
the term
system
software
 In
The
mostpublications,
important types
of system
software
are: is also used to
designate software development tools (like
compiler,
linker
orand
debugger).
 aThe
computer
BIOS
device firmware, which provide basic
functionality to operate and control the hardware connected to
or built into the computer.
System software is usually not what a user would buy
a computer for - instead, it can be seen as the basics of a
 The operating system (prominent examples being Microsoft
computer
come
built-in
pre-installed.
Inparts
contrast
Windows, which
Mac OS
X and
Linux),orwhich
allows the
of a to
computer
to work software
together by
performing
taskstolike
system
software,
that
allows users
do things like
transferring data between memory and disks or rendering
create
play Itgames,
listen to
music, ortosurf
outputtext
ontodocuments,
a display device.
also provides
a platform
runthe
web
is called
application
high-level
system
softwaresoftware.
and application software.
Types of System Software :
 Operating Software
 Utility Software
What is Operating System?
 An operating system (OS) is a set of system
software programs in a computer that regulate the
ways application software programs use the computer
hardware and the ways that users control the computer.
For hardware functions such as input/output
and memory space allocation, operating system programs
act as an intermediary between application programs and
the computer hardware, although application programs
are usually executed directly by the hardware.
 Examples :

Microsoft Windows XP, Linux, Windows 7, Ubuntu,
Kubuntu
What is a Utility Software?
 In computers, a utility is a small program that provides
an addition to the capabilities provided by the operating
system. In some usages, a utility is a special and
nonessential part of the operating system. The print
"utility" that comes with the operating system is an
example. It's not absolutely required to run programs
and, if it didn't come with the operating system, you
could perhaps add it. In other usages, a utility is an
application that is very specialized and relatively limited
in capability.
 Example :

Scan Disk