Operating System Software Essay

Submitted By caljay0195
Words: 907
Pages: 4

Operating system software LO1 - Understand the components of computer systems


as many operating systems as you




at operating system software

◦ Develop knowledge of GUI and Command line interfaces ◦ Research the advantages and disadvantages of popular operating systems.



operating system is the most important software that runs on a computer.


manages the computer's memory, processes, and all of its software and hardware. It

also allows you to communicate with the computer without knowing how to speak the computer's "language."

What is an operating system?


you boot a computer three things happen.. Tests

are ran to make sure everything is working correctly


for new hardware are carried out

then starts up the operating system

What does it do?


the operating system has started up, it manages all of the software and hardware on the computer.


of the time, there are many different programs running at the same time, and they all need to access your computer's central processing unit (CPU), memory, and storage


operating system coordinates all of this to make sure each program gets what it needs.

What does it do?


modern operating systems use a GUI


are sometimes called WIMP
(windows, icons, mouse and pointer) and reflect how the user can interact with the operating system.

Graphical user interface (GUI)

GUI interface


GUI are easier for novices

Only valid options are available •

Consistent layout


Use more main & secondary memory •

Require a more powerful processor and better graphics display •

Slower executing a command because more interpretation is need

Can be too many steps to take for expert users

Complex to design

Comprehensive on-line help Can be customised by the user  The

system provides a command prompt (e.g. C:\>) where the user can type a command which runs a program or carries out housekeeping activities (e.g. copy a file, check IP settings)

Command line operating system



Easy to implement on basic displays

Unsuitable for inexperienced users

Cheap to produce

Command language errors can be made by user

Suitable for rapid expert use ◦

Command language must be learnt & remembered

System interaction is limited to the keyboard


operating system is at the heart of any computer system and there are various operating systems on offer.


most popular are

◦ Dos
◦ Linux
◦ Windows

Operating systems


hardware connects to the mother board runs through a driver before it connects to the operating system

Task sheet


operating system



by Microsoft for IBM

a command line interface


 Extremely

small installation footprint

 Allows

direct access to hardware  Universally

compatible with all PC’s

 Uses

very little system resources Vs.


 Out-dated

now – not compatible with new software

 Only

one application can run at once

 Uses

command line so difficult to use unless trained/experienced  Max

of 2gb of HDD can be addressed  Produced

by Microsoft which was invented by Bill

 Invented

as an add-on to DOS

 Is

the most widely used OS on the planet 91% in 2009

 It

uses a GUI and WIMP (windows icon mouse pointer)

 There

have been many different versions of Windows, but the most recent ones are Windows 8 (released in
2012), Windows 7 (2009), and Windows
Vista (2007).


◦ Use

of windows is widespread and a huge amount of commercial software is compatible Disadvantages

Source code is closed

Often buggy

Not secure enough for high end security needs

Large difference in operation between versions

Installation of later versions requires a large amount of HDD space ◦

Performance is