Unit 1 Part B--Operating Systems

flosssnailsMobile - Wireless

Dec 10, 2013 (3 years and 6 months ago)

77 views

COMP U T E R T E CH NOL OGY

( S 1 OB J 2 2
-
3 AND
OB J

3
-
2 )


SOFTWARE

UNIT 1

PART B

SOFTWARE CATEGORIES


There are two main type of software categories


Operating Systems Software


Application Software


Each serve a different but important part in the
information processing cycle.

UNDERSTANDING
OPERATING SYSTEMS

OPERATING SYSTEMS

OPERATING SYSTEM’S JOB


Booting:

the sequence of events that occurs when
you turn the computer on and when it becomes
ready to process data.


During this process, the computer does several things:


It
runs a self
-
test
to make sure everything is working correctly.


It
checks for peripheral devices

(a device connected to the
computer that expands the computer’s input, output or storage capabilities).


It then loads the
operating system
.


OPERATING SYSTEM SOFTWARE

FOR PERSONAL COMPUTERS


The

Operating System
is the
master controller
on
your computer. Computers cannot function
without an operating system.


The OS
manages

the computer's
memory
,
processing
,
software

and
hardware.


TYPES OF OPERATING SYSTEMS


Operating systems usually come
preloaded

on a
computer when you buy it.


Most people use the operating system that comes
with their computer, but it is possible to upgrade or
even change operating systems.


The three most common operating systems for
personal computers are
Microsoft Windows
,
Mac OS
X
, and
Linux
.


WINDOWS OPERATING SYSTEM

CHARACTERISTICS


A
lmost
90% of the operating system market
share


I
ntroduced
in
1995


Pros
:


Compatibility:
Almost every application, driver or game will
work on Windows
.


Ease of use:
Much easier to use than Linux


Software Selection:
Windows has the largest selection of
software available



Cons:


Security:
More vulnerable to virus attacks


Slower:
Windows
requires a lot of computer resources
(memory, processor, disk space), and thus, runs slower.


Price
:
C
osts
over a hundred dollars.
Software available for
Windows computers can also be expensive.


MAC OPERATING SYSTEM

CHARACTERISTICS


MAC OS has the first ever successful graphical
-
based
operating system, released one year before Windows.



Pros:


Viruses
:
M
acs
get
fewer viruses

(
mostly because of Window superior market)


Reliability
:
Mac OSX is very stable. When an application crashes, only
the application is
affected, thus
it keeps working without the entire
system crashing
.


Speed:
The system manages its resources more effectively



Cons:


Expensive
:
MAC OSX
costs
more
than Windows.
Also MAC computers
cost more than a comparable PC.


Only available on Apple computers:
If you already have a computer,
you cannot install MAC
OS on
it unless it's an
Apple


Compatibility
:
Fewer programs and games run on MAC than its
Windows counterpart

LINUX OPERATING SYSTEM

CHARACTERISTICS

Smaller
Operating System than Windows or MAC OS, but growing


Pros:


Cost:
Linux is F
-
R
-
E
-
E.
You can download it, install it, use it,
and customize it FREE!


Variety
:
To use Linux, additional
software needs to be bundled with
it.
Several
hundred
bundles (called "distributions" or
"
distros
") exist. The most popular ones
include Ubuntu, Mint and Fedora. The good thing is, with so many different

distros
,’
there is always one to suit your needs!


Reliability:
Can often be used for months without needing to be rebooted.


Cons
:


Complicated:
Linux requires advanced computer
knowledge in order to get
it
to
work.


Compatibility:
D
oes
not have as many programs
or
games as
Windows, although
some
distros

allow you to run Windows software


Vendors
:
You won't find a lot of vendors selling Linux computers. Usually, you'll just
end up
buying a Windows
computer,
reformatting the
hard drive, and
installing
Linux yourself.

GRAPHICAL USER INTERFACE


Modern operating systems use
Graphical User
Interface
, or
GUI

(pronounced gooey)


An
interface

allows you, the user, to
communicate

with your computer.


GUI lets you use a mouse to click on
icons
,
buttons,

and
menus


Icon
: An image (graphic) that represents an executable file.


Menu:
A dropdown list or table of executable options


Before
GUI
, computers used command
-
line
interface which meant the user had to type every
single command and the computer would only
display text.

Command
-
Line Interface

vs.

Graphical User Interface

GUI has made
computers much
easier to use!


WYSIWYG


WYSIWYG

( /
ˈ
w
ɪ
ziw
ɪɡ
/ WIZ
-
ee
-
wig)is an acronym for
What You See Is What You Get
. The term is used in
computing to describe a system in which what you
see displayed on your screen during editing
appears in a form close to its appearance when
printed or displayed as a finished product, which
might be a printed document, web page, or slide
presentation.


This was not possible with a command
-
line
interface.




Operating Systems for mobile devices generally
aren't as
fully
-
featured

as those made for desktop
or laptop computers.


You can still do a lot of things on your mobile device
including: watching movies, browsing the internet,
managing your calendar, playing games, and
more…

Operating Systems for

Mobile Devices

OPERATING SYSTEMS

FOR MOBILE DEVICES


Mobile devices such as phones, tablet computers,
and mp3 players run operating systems that are
designed specifically for mobile devices.


Examples of mobile operating systems include
Apple iOS, Windows Phone 7, and Google Android.

UNDERSTANDING
APPLICATIONS

WHAT IS AN APPLICATION OR APP?


An application (or app) is software designed to
help the user perform specific tasks.


Applications for desktop or laptop computers are
sometimes called
desktop applications
or

application software
.


Applications for mobile devices are called
mobile
apps
.


When you open an application, it runs inside the
operating system until you close it.


Multitasking

means running more than one
application at the same time.

APP VS. APPLICATION


Remember:


Mobile Apps

are simple applications that
can be downloaded from the Internet
cheaply or even for free. Many apps are
available for mobile devices and even
some TVs.


Desktop Applications
are more full
-
featured software that allow you to run
complex software like a word processor,
spreadsheet, computer game, or web
browser.

Click below to watch a short video clip about
Computer Applications

COMMON APPLICATION SOFTWARE

Application Software

Categories

Category

Example

Possible uses

for this software

Word Processing

MS Word

Writing

a letter, creating a report…

Presentation

MS PowerPoint

Creating a presentation (slide show)
about a specific topic.

Spreadsheet

MS

Excel

Calculating a set of numbers, creating
charts…

䑡瑡t慳a

䵓 Ac捥獳

A 捯汬散c楯渠潦o楮景牭慴楯渠潲条湩穥搠瑯t
灲潶楤攠敦晩f楥湴ir整物ev慬

䑥獫瑯瀠偵扬楳桩湧

䵓 偵扬楳桥h

䍲敡C楮i 晬祥牳Ⱐ捡瑡汯杵敳e慮a 灯獴敲s

W敢 䉲潷獥ss

䥮瑥牮整

䕸E汯l敲Ⱐ䙩r敦潸

噩敷楮e 愠睥戠灡pe

䥭慧攠䕤楴楮i

偨潴潳o潰,

偡楮P

Sk整e桩湧Ⱐ獨r楮歩湧n慮a re
-
捯汯c楮i
業慧敳

Ac捯畮瑩湧

兵楣Q敮e

S慧a

K敥灩湧n瑲慣欠潦o浯湥礠捯c楮i 楮i慮a
杯楮i 潵琠楮i愠扵獩湥獳

THE END!

T HERE I S NEVER AN END T O T HE POSSI BI LI T I ES
I
N T HE
WORLD OF COMPUT I NG!

REFERENCES


http://www.informatics
-
tech.com/


http://www.gcflearnfree.org/