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SOFTWARE
IE2Presented by:
SoftwareIt means computer
instructions or data. Anything that can be stored electronically is software.
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.
Categories of Software
Software is often divided into two categories :
\Operating System Application Software
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
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.
Operating System
Without a computer operating system a, computer and software programs would be useless.
Operating System
Operating System Types
GUI –Graphical User Interface Multi-user Multiprocessing Multitasking Multithreading
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
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
Multiprocessing
An operating system capable of supporting and utilizing more than one computer processor.
Example: Linux, Windows 2000,Unix
Multitasking
An operating system that is capable of allowing multiple
software processes to run at the same time.
Example :Unix, Windows 2000
Multithreading
Operating systems that allow different parts of a software
program to run concurrently.
Example :Linux, Windows 2000,Unix
Operating System
Basic Tasks of an Operating System
Recognizing input from the keyboardSending output to the display screenKeeping track of files and directories on the
diskControlling peripheral devices such as
disk drives and printers.
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.
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.
Programs of an Applications Software
Database ProgramsGamesWeb Browsers Word ProcessingSpreadsheets
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.
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.
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