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DATA

Coding

less GIGO

Garbage In Garbage Out

less rubbish data goes in, the less rubbish data comes out.

Present = P

Advantages

More accurate - only type in certain things.

less chance making a mistake

Data takes up less storage

Faster - less time consuming than writing it out fully.

Disadvantages

lose detail

have to know the codes to understand and use it.

Shortening Data

For example: Doctor > DR.

Encoding

Converted in Binary so that the computer can understand it.

Binary is the 'language' of the computer.

When data is converted to binary.

How Does Data Arise?

Direct

Data that is collected for a new specific purpose or reason.

Email address collected just for a subscription or to sign up, used just by that company.

weather measurements collected for weather forecast - wind speed, wind direction, precipitation, temperature.

Indirect

Data that is recycled from already collected Data for a new purpose.

A Purpose that is different from the original purpose of the collection of the data.

When signing up for a subscription and entering your Email adress, and then they give or sell your Email address to another company so they can send you advertisements.

weather forecast used to predict sales - the amount of ice cream sold on a day thats sunny, by another company for example.

Data is raw facts and figures that have no set values or meaning.

There are four types of data:

Number

Price

Age

Exam Mark

Image

Still

Digital Photograph

Moving

Recorded Video

Sound

Recordings.

Music

TEXT

Phone Number

Name

Email Adress

S.H.I.P.P.D

Procedure

Transferred

Jobs

Users

Processed Data

Output

Storage

Input

Apps

What is an ICT system?

An ICT system will include the components:

Data

Procedures

People

Information

Hardware

Software

The output information goes directly to a human being or to another computer.

Subtopic

A system is a procedure that involves input, process and output.

ICT is the use of technology for the input of data which can be processed, stored, transferred and used to output information.