Computers process
data.
Data consists
of raw facts and figures - for example:
- Exam marks
- Facts from a survey - how many
people live in Hornsea?,
- Readings from a light sensor.
Data can be of different types -
| Strings (alphanumeric) |
|
| Decimal
(real numbers) |
|
| Integers |
|
| Currency |
|
| Dates |
|
| Calculated |
|
| Pictures/Graphics |
|
| Sounds |
|
| Annimation / Video Clips |
|
In a computer system, ALL
data is represented as numbers.
A computer processes data to output information.
People apply rules and make deductions from this information
to produce knowledge.
If we put the wrong data into a computer we will get
the wrong results. (GIGO
= Garbage In - Garbage Out)
Test
your knowledge! |
