Know the requirements of the ICT IGCSE Understand the need for
extensive reading & research Be able to describe the difference
between data and information
Slide 3
You will have 4 lessons per week and are expected to complete
30 40 minutes per night homework. Homework is a vital part of this
course and it is important that you ensure you put in the right
amount of time and effort, in order to make sure you get the best
grade possible in your exams.
Slide 4
The written theory exam is 2 hours long and covers a wide range
of topics. Questions range from simple true/false ones, to ones
requiring long, extended answers. This paper accounts for 40% of
your final grade.
Slide 5
There are 2 practical exams, each of 2 hours. Paper 2: Email,
word processing, databases. Paper 3: Web authoring, spreadsheets,
multimedia presentations. These two papers make up 60% of your
final mark.
Slide 6
is divided into eight sections: 1. Types and components of
computer systems 2. Input and output devices 3. Storage devices and
media 4. Computer networks 5. Data types 6. The effects of using
ICT 7. The ways in which ICT is used 8. Systems analysis and
design
Slide 7
The subject of ICT encompasses any technology that allows us to
process data and to communicate.
Slide 8
What is Data? In terms of ICT, data is simply any numbers,
letters or symbols that can be entered into a computer system. Here
are some items of data: A, 20, DOG, 3.1415927, ABC123, +++ But what
do they mean? Who knows? They could mean anything!
Slide 9
Data values dont have any meaning unless we put them into
context (context means a setting or circumstance). For instance, in
the above example what does the value 20 mean? 20 cm? 20 minutes?
20 cats? Without a context the value 20 is meaningless. But, if we
provide a context for our data, it becomes something far more
useful: information
Slide 10
We might enter this data into a computer 1861977905 0806973587
0806992867 1402748124 0831110848 Without knowing the context (what
the data actually represents) the data is just a meaningless
collection of numbers
Slide 11
Without knowing the context (what the data actually represents)
the data is just a meaningless collection of numbers. However, if
we are told that the values represent the ISBNs of books, the
values now have a context. With context, they have meaning - they
are now information.
Slide 12
Information is Data + Context
Slide 13
A system has three stages...
Slide 14
Something feeds into the system (the input) The system does
something with the input (the process) The process gives a result
(the output)
Slide 15
consists of input devices, a processor and output devices. It
also has storage devices.