data, information and knowledge

Data has no meaning or relavence where as information is this data but has a context. 

for example:

"65" is just a random number, this is data.

"65 is an age" we are now giving the number a meaning, therefore it becomes information.

information is data which has been 

• processed 
• converted to give it meaning
• organised in some way

knowlege is how to interpret and aply information by aplying rules and once this is done, decisions can be made on the infromation recived.

Data- raw facts or figures whith no meaning or relavence 

information- processed data or data with a context 

knowlege- derived from information by aplying rules to it

• coded data takes less efor to type in 
• more data can be seen on screen 
• takes up less storage space 
• easier to check that a code is accurate using validataion checks

size of clothes 

• S = small 
• M = medium 
• L = Large 
• XL = Extra large 

airport codes:

• LHR = London Heathrow 
• MAN = Manchester 
• RHO = Rhodes 

encoding data has one main flaw, the data is les accurate when it is encoded. there may also be a problem if there are 2 codes that clash.