Our Grade 11 C.A.T Noteset is the ultimate guide to success in Computer Application Technology. With detailed and colourful interpretations for terms 1 to 4, these notes are perfect for both DBE and IEB students. Our Noteset covers all the key concepts and terminology you need to know. Whether you'...
, System Technologies & implications
1. ALL ABOUT ICT
Information Communication Technology > simply a set of tools that can be used to solve
problems
Manipulated or processed data.
I INFORMATION
The process of transferring data/information from
C COMMUNICATION
one place to another.
→ Systems Technology (Hardware & Software)
→ Communication Technology (Networks &
T TECHNOLOGY
Communication Devices)
→ Internet technology (Internet, WWW, and e-
communication)
WORKPLACE [ICT]
→ work faster & more effectively
→ better & more informed decisions > much faster
→ store large amounts of data > ‘make sense’ of it
→ identify new trends and tendencies > adapt to them
→ communicate more effectively
→ communicate immediately
→ perform tasks that are not easy or safe for people to do
→ work wherever we have access to a computer
→ perform repeated mechanical actions
→ empower individuals
Skills learned in CAT help you to:
& Make structured notes and summaries
& Make professional offers
& Analyse data quickly and efficiently
& Adjust e-documentation quickly and easily
& Create professionally displayed documents
Each career described below uses its specialized types of hardware and software:
& Fashion, game and web page designers = graphic software & computers
& Physicians and health practitioners = upgrade their skills to make the best use of
new devices to improve the care of their patients.
& DJs and musicians = combine and compose music [ ICT ]
& businesses use social media to advertise and stay in touch with their customers.
& Photographers & Filmmakers use ICT on a large scale.
& Accountants love spreadsheets!
, THE COMPUTER SYSTEM UNIT (units)
[ cornerstone of any ICT system ]
FACTORS TO COMPARE COMPUTER SYSTEMS
1. powerful [POWER CAPACITY] → specifications of the computers [speed of CPUs (gHz),
and how much RAM they have installed, amount and type of storage space, type of
graphics card]
2. Type of usage
3. Their size (mobility) → RANGE from large (mainframe) computers that fill large rooms
to laptops, tablets and smartphones.
4. Software usage → type of operating systems = 'platforms' [computers = 'Linux
machines' or 'Windows machines']
(5.PRICE)
INFORMATION PROCESSING CYCLE:
Computers take input (input device > keyboard or mouse), do something with it (process
it), and then produce output (output device > monitor / printer). The input or output
often needs to be saved for later use.
DEDICATED VS. MULTIPURPOSE (PERFORMANCE) COMPUTERS
DEDICATED PERFORMANCE / MULTIPURPOSE
→ perform only one specific task → load software > enables them to
→ automatic teller machines (ATMs) perform a wide range of tasks
→ GPS (Global Positioning System) devices → Computers are multi-purpose devices >
→ household appliances ( microwave ovens load programs (programs) on them
and washing machines ) that enable them to perform a wide
→ NOT COMPUTERS variety of tasks
→ = traditional operating system (Windows, Linux and macOS)
→ = hardware designed for portability [all-in-one design]
→ = includes the screen, keyboard, and a pointing device & a
battery so that it can be used for a limited number of hours
without access to an external power source.
Laptops/Notebook/
Ultra book/ Net
LAPTOP NETBOOK ULTRA-BOOK
book
same types of portable cheap, uses less lighter and thinner,
computers [machine with power, no CD/DVD, but just as
a screen size larger than lower screen powerful as other
12 '' or 13 '' = same type of resolution entry-level
laptop] desktop
POWER SETTINGS (LAPTOP)
big advantage = portable + work on battery power
promote green computers → battery last as long as possible before
we must recharge it
operating systems provide power schemes or settings > control how
your computer manages power
→ Specify > computer should save power by starting 'sleep' or
hibernating (portable computers) if it has not been used for a while
→ Adjust screen brightness to reduce power consumption
→ Choosing a balance between power consumption and performance
→ Saving power usually reduces the performance of your system >
power consumption increases the choice of a high-performance
setting and reduces the amount of time you can use a laptop or
device before recharging the battery
Tablets = portable computer & touch or pen sensitive screen
BUT : PHABLET [GREAT EXAMPLE OF CONVERGENCE] = smartphone with a
screen size larger than 5 ''
tablet PCs = reversible screen & normal keyboard
CONSUMER TABLET TRADITIONAL TABLET
& Screen Touch/pen sensitive & Reversible screens
screen & Works as a normal
& Users communicate directly with notebook or tablet
the screen
& Special Operating Systems
& Battery with longer life
& 3G/WIFI wireless connections
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