2. Learning Goals for Today
1.
To discuss the role of software in computing
systems
2.
To learn to differentiate among software
belonging to the system and application
categories
3.
To learn about software ownership

4. DEFINITION
• SOFTWARES - are programs that make a
computer run. They are sets of instructions
which tell the computer what to do to come
up with the desired result.

5. The Software Development
Process

6. Categories of Computer Software
Computer
Software
System
Software
Application
Software
GeneralPurpose
Programs
ApplicationSpecific
Programs
System
Management
Programs
System
Development
Programs

7. Hardware
Operating System
Utility
Language
Translator
Scientific
Apps.
Device Driver
Business
Apps.
Entertainment
Apps.
System software
Application software
Productivity
Apps.

8. Software
System
Software
Application
Software

9. System Software
- Programs that work automatically once you open or
boot your computer.
- Their task include loading and running programs,
checking and protecting computers, and controlling
hardware.
- It is the control software that operates the hardware and
allows the application to run.

11. Operating System (OS)
• Performs its work invisibly to control the internal functions
of a computer, e.g. maintaining files on the disk drive,
managing the screen, controlling which tasks the
computer performs and in what order
• It interacts directly with the computer HW
• Other SW normally does not directly interact with the HW,
but through the OS

12. Examples
•
•
•
•
•
•
•
Windows XP – home and business
Windows 2000 – business network use
Mac Operating System – GUI, graphics
OS/2 Warp – commercial work
UNIX – general purpose, mainframe
Linux – alternative to Windows
Dos – command driven

13. SYSTEM MANAGEMENT PROGRAMS
Utility Programs
• Virus checking and cleaning.
• Security using identification and passwords.
• File and hard disk management for efficiency and
storage.
• Customising the computer to the users
requirements, i.e. short cut menus from mouse click.
• Setting peripheral devices to the users
requirements, i.e. setting the monitor resolution.

14. Utilities
Computer programs that perform a particular
function related to computer system
management and maintenance
Examples:
1.
2.
3.
4.
5.
Anti-virus SW
Data compression SW
Disk optimization SW
Disk backup SW
Disk cleaner

15. Operating Systems
• Operating Systems run in the
background without the users
being aware of it.
• It controls the
inputs, outputs, interrupts, and
storage of files as requested by
the applications software.

17. LINUX

18. DOS

19. SYSTEM DEVELOPMENT PROGRAMS
SYSTEM DEVELOPMENT
PROGRAMS
PROGRAMMING
LANGUAGES
LANGUAGE
TRANSLATORS
LINKER
LOADER

20. LANGUAGE TRANSLATORS
LANGUAGE TRANSLATORS
COMPILERS
INTERPRETERS
ASSEMBLERS

21. COMPILER
SOURCE PROGRAM
COMPILER
INPUT
EXECUTABLE PROGRAM
OUTPUT

22. INTERPRETER
SOURCE PROGRAM
INPUT
INTERPRETER
OUTPUT

23. ASSEMBLER
SOURCE PROGRAM
(In Assembly language)
LDA
ADD
SUB
STO
CMP
JNZ
OUT
OBJECT CODE
X
Y
Z
A
B
TOP
Z
ASSEMBLER
10001010010
00101001000
00101001000
11110010100
00100001111
00101110010
00010100111

24. LINKER AND LOADER
SOURCE PROGRAM
CIN>>X;
A=X+Y-Z
If(a !=B)
COUT<<A;
WHILE {!THRU}
OBJECT CODE
COMPILER
10001010010
00101001000
00101001000
LINKER
MEMORY
LOADER
EXECUTABLE
PROGRAM

25. APPLICATION SOFTWARE
• Are programs installed in the computer. It
enables the user to do different tasks.

26. APPLICATION SOFTWARE
• Used for a specific purpose or application.
– Word processing;
– Numerical analysis;
– Recording of data;
– Designing and graphics;
– Image processing;
– Presentations;
– Desk top publishing;
– Web design.

27. WORD PROCESSORS
• Used in creating letters, memos, reports and
other write-ups.
Examples: Wordstar
MS Word
WordPerfect

28. MS Word

29. ELECTRONIC SPREADSHEET
• Software that are equipped with rows and
columns where data may be entered and
processed automatically or tabulated.
Examples:
Visicalc
Quattro
Supercalc
Ms Works
Lotus 123
Excel

30. EXCEL 2007

31. VISICALC – the first Spreadsheet

32. SuperCalc

33. DATABASE
• Programs that can be use to organize data in a
customized way.
Examples:
MS Access
MySQL
Dbase
Oracle
Foxbase
Lotus Approach

34. Dbase

35. Oracle Database

37. Entertainment Software
• Specially designed for fun and relaxation.
Example
Real Player WinAmp QuickTime
Windows Media Player VLC Media

40. Multimedia, Desktop and Image
Editing Software
• Used to create graphics and publications and
to edit images
Examples
Adobe Photoshop Adobe Pagemaker
Corel Draw
Publisher

41. Designing and graphics

42. Thank You
MAHESH BABU
• 381498042
• MBA 1st SEM
MANIDAR CHOWDARY
• 381498045
• MBA 1st SEM
MAHESH REDDY
• 381498044
• MBA 1st SEM