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1. CMT 04212: COMPUTER APPLICATIONS
Session 3:
COMPUTER SOFTWARE
By: Ramadhani Chibwana
Victor Mwambije

2. Learning Objectives
Meaning of computer software
Types of computer software
Differentiate between operating system and
application software
Explain function of computer software

3. COMPONENTS OF COMPUTER cont…..
Computer Software
Computer software are programs that tell the computer what to do
OR
Programs which consist of the step-by-step instructions that tells the
computer how to do its work.
TYPES OF COMPUTER SOFTWARE
1. Operating system(System software)
2. Application software
3. Programming software- java,HTML
4. Harmful software- VIRUS, WORMS, TROJAN HORSE

4. Operating system
 Is a set of programs that controls and managers the software and
hardware resources of a computer.
Example:
windows2000
Windows7
Windows XP
UBUNTU
LINUX
Windows 8
Windows 10

5. Controls the workings of the computer generally: the user interacts
primarily with application software.
System software enables the application software to interact with the
computer hardware.
System software is ‘background’ software that helps the computer to
manage its own internal resources.
System software is not a single programme; rather it is a collection of
programmes.
Operating system…

6. Operating system…
Operating system (OS) has three main functions:
I. Manage the computer's resources, such as the central processing
unit, memory, disk drives, and printers
II. Establish a user interface
III. Execute and provide services for applications software.

7. Three Categories of Operating Systems
 Embedded operating system – Is the one pertaining to code or a
command that is built into its carrier.
 Network operating system - operating system specifically designed
to support networking.
 Example windows server 2016
 Stand alone operating system- Is the one used in a device that does
not require support from another device or system, for example, a
computer that is not connected to a network.
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8. Applications software
 Accept input from the user and then manipulates its to achieve the
output.
 Programs designed to do a specific task designed mainly for users.
These programs can be categorized into two parts
1) basic applications.
2) Specialized applications

9. Application software
 Includes
 Business software
 Health software
 Graphics software
 Educational
 Communication

10. Basic Applications
Also known as general-purpose applications, they are widely
used in nearly all career areas.
They are programs that one must know to be considered
‘competent’ in computing.
Example of basic applications
 Ms office package(2003,2007,2010,2013)
 Mozilla fire fox, VLC etc

11. Specialized Applications
 Also known as special-purpose applications, these include thousand of
other programs that are more narrowly focused on specific
occupations.
 Some of the best known are graphics audio, video, web authoring,

12. Communications software
 Enables your computer to use a modem and telephone lines to
exchange information with another computer equipped with a modem
and communications software.

13. Application software
 Application software is designed to help you accomplish a certain kind of
task. You might want to calculate your income taxes, write marketing
proposals, letters, or reports, pay bills, maintain a mailing list, or control
product inventory.
 There are thousands of application programs you can choose from.
Word processors, spreadsheets, database management systems, and
computer-aided design (CAD) systems are just some of the many
software applications available.
 Word processing software is used to create, edit, save, and print text.
Word processing software is commonly used for producing letters,
memos, reports, and envelopes.

14.  A spreadsheet is a table of cells arranged in rows and columns into
which numerical data and mathematical formulas can be entered
and manipulated. A spreadsheet can be used for most mathematical
and financial projects. Budgets, cash flow projections, stock price
tracking, and balance sheets are just some of the possible
applications.
 Database management software allows you to effectively manage a
database. It enables you to retrieve needed information, print
reports, and update your records quickly and easily.

15.  Desktop publishing software enables you to combine text and
graphics to produce typeset-quality documents. Newsletters,
brochures, pamphlets, books, and manuals all can be designed using
desktop publishing software.
 Computer-Aided Design (CAD) software enables the computer to
replace traditional drafting and illustrations tools. It is used to create
architectural and engineering drawings.
 Utility software helps to analyze, configure, optimize and maintain
the computer.
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16. Key Points
 Computer software are programs that tell the computer what to do
 Application software is designed to help you accomplish a certain kind
of task.
 Operating System is a set of programs that controls and managers the
software and hardware resources of a computer.
 System software enables the application software to interact with the
computer hardware

17. Evaluation
 What is computer software?
 Types of computer software
 Differentiate between operating system and application software
 Explain the advantage and disadvantages of using computer software
in documentation and record management
 Explain function of computer software

18. References
Herniter, M.E. (2000). Personal Computer
Fundamentals for Students, Hardware Windows
2000 Application. (2nd ed.). Prentice Hall.
Joos, I. Whitman, N., Smith, M., et al. (2006).
Introduction to Computers for Healthcare
Professionals. (4th ed.). London: Barb Mews.
Morris, M. & Charles, M. (2003). Logol
Computer Designer Fundamentals. Prentice Hall.
O’leary, T. & O’leary, L. (2006). Computing
Essentials, Introductory Edition. Boston Burr
Ridge: Arizona State University