This EBOOK is designed for CAT subject for Grade 12. The topic it focuses on is Systems Technologies for Grade 12 term 3.

1. COMPUTER
APPLICATIONS
TECHNOLOGY
(CAT)
EBOOK FOR GRADE 12

2. Presentation
compiled by
Sinenhlanhla
Vilakazi.
A student teacher
at the University of
Johannesburg

3. INTRODUCTION AND
BACKGROUND OF COMPUTER
APPLICATIONS TECHNOLOGY

4. AIMS OF COMPUTER
APPLICATIONS
TECHNOLOGY
• CAT will ensure that
learners are equipped
with marketable skills to
cope in an information
society. Although CAT is
located within the
Information Technology
and Computer Sciences
sub-field, this subject
is complementary to all
other subjects in the
Further Education and
Training band.
• It also makes it
possible for
learners to collect,
analyse and edit
data and to
manipulate, process,
present and
communicate
information to
different sectors of
society.

5. The focus of this presentation will be
on Systems Technologies

6. Unit 4 System software and
computer management
(Term 3)
• 1 Role of the operating system
• The operating system is a set of programs responsible for controlling a
computer. The operating system maintains system software, runs
applications and controls hardware devices. Provides the user with an
interface to tell the operating system what to do.
• 1.1 Starting the computer Booting is the start-up procedure in which a
computer checks that all its parts are working and the loads the operating
system.

7. 1.2 Providing a user interface
The user interface is a way in which a user can
control the computer. Known as a Graphical
User Interface (GUI).
Uses graphical elements such as icons, buttons,
tabs and drop-down boxes instead of text
commands instead of text commands.

8. 1.3 Managing applications
The operating system manages all of the
applications within the computer system.
While the application is busy the OS assigns
and controls system resources needed. The
operating system provides input from the
user and returns the output.
1.3.1 Controls single users and multiple
users
Single-user operating systems only allow
one user to work on the computing device
at any time. Single-user operating systems
can connect to networks in order to use or
share resources.
Multi-user computers are good solutions in
situations where space and finances are an
issue. This usually includes the use of thin
clients and servers or mainframes. Thin
clients contain the absolute minimum
hardware as most of the processing and
storage happens on the server/mainframe.

9. FOR MORE
INFORMATION
USE THE BELOW
RESOURCES

10. THEORY BOOK FOR CAT

11. STUDY GUIDE FOR
COMPUTER APPLICATIONS
TECHNOLOGY GRADE 12

12. ASSESSMENTS ARE
VITAL FOR BETTER
COMPREHENSION!! This Photo by Unknown Author is licensed under CC BY-SA-NC

13. CLICK ON THE
IMAGES

14. ADDITIONAL
RESOURCES FOR
COMPUTER
APPLICATIONS
TECHNOLOGY

15. PAST
PAPERS
AND
MEMOS

16. ACKNOWLEDGEMENTS
• https://www.education.gov.za/C
urriculum/NationalSeniorCertific
ate(NSC)Examinations/NSCPastE
xaminationpapers.aspx
• https://viaafrika.com/wp-
content/uploads/2020/06/Gr12-
CAT-TG-SG_LR.pdf
• https://www.siyavula.com/read/
za/computer-applications-
technology/grade-12