1. Presented by:

2. Software
It means computer
instructions or data. Anything
that can be stored
electronically is software.

3. Difference of a Software Engineer
from a Programmer
A programmer
creates the codes
that make a program run,
a software engineer
creates the designs the
programmer implements.

4. Categories of Software
Software is often divided
into two categories :
Operating System
 Application Software

5. Operating System and
Application Software
A layer
structure
showing
where the operating
system software and
application software are
situated while running on
a typical desktop
computer

6. Operating System
The Operating System is
the most important
program that runs on a
computer. Every general-
purpose computer must
have an operating system
to run other programs.

7. Operating System
Without a computer
operating system a,
computer and software
programs would be useless.

8. Operating System

9. Operating System Types
 GUI –Graphical User
Interface
 Multi-user
 Multiprocessing
 Multitasking
 Multithreading

10. Graphical User Interface
A GUI Operating System
contains graphics and icons
and is commonly navigate too
by using a computer mouse.
Example : System7.x,
Windows98, Windows CE

11. Multi-user
A multi-user operating
system allows for multiple users
to use the same computer at
the same time and different
times.
Example :Linux, Windows 2000,
Unix

12. Multiprocessing
An operating system capable
of supporting and utilizing
more than one computer processor.
Example: Linux, Windows 2000,
Unix

13. Multitasking
An operating system that is
capable of allowing multiple
software processes to run at
the same time.
Example :Unix, Windows 2000

14. Multithreading
Operating systems that allow
different parts of a software
program to run concurrently.
Example :Linux, Windows 2000,
Unix

15. Operating System

16. Basic Tasks of an Operating System
Recognizing input from the keyboard
Sending output to the display screen
Keeping track of files and directories
on the disk
Controlling peripheral devices such as
disk drives and printers.

17. Applications Software
It is also called end-user programs.
It includes programs that do real work
for users.
It is the general designation of
computer programs for performing
user tasks.

18. Applications Software
Figuratively speaking,
applications software sits on
top of systems software
because it is unable to run
without the operating system
and system utilities.

19. Programs of an Applications
Software
Database Programs
Games
Web Browsers
 Word Processing
Spreadsheets

20. Categories of an Application Software
 Vertical Application-designed for
a particular type of organization.
 Horizontal Application- are the
most popular and widespread in
departments or companies.

21. Conclusion
The operating system itself can be considered
application software when performing simple
calculating, measuring, rendering, and word
processing tasks that not used to control
hardware via command-line interface or
graphical user interface. This does not
include application software bundled within
operating systems such as a software
calculator or text editor.