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 are easier for novices
Only valid options are available •
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
◦ MAC OS
hardware connects to the mother board runs through a driver before it connects to the operating system
by Microsoft for IBM
a command line interface
small installation footprint
direct access to hardware Universally
compatible with all PC’s
very little system resources Vs.
now – not compatible with new software
one application can run at once
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
as an add-on to DOS
the most widely used OS on the planet 91% in 2009
uses a GUI and WIMP (windows icon mouse pointer)
have been many different versions of Windows, but the most recent ones are Windows 8 (released in
2012), Windows 7 (2009), and Windows
of windows is widespread and a huge amount of commercial software is compatible Disadvantages
Source code is closed
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 ◦