BASIC COMPUTER APPLICATION
DATA AND INFORMATION
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We always records events, transactions, items details e.t.c
For example;
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Sales
Purchases
Salaries
People's movements
Customer/clients details. Etc
These are reffered as DATA, by themselves are meaningless and useless, To
extract meaning from data we need to combine it with other data.
Example,to know if there is profit/loss, he/she needs to combine by comparing cost and price
of the items.
 The process of making data meaningful or useful is called DATA PROCESSING
 Processed Data called INFORMATION
Example of information are;
 Profit or loss
 Customer's bill
 Student's report
 Arranged values related to items
 Story.....
These are meaningful and useful.
Data processing consist of a series of actions or stages on data. The Data processing consist
of four stages;
1. INPUT
2. PROCESS
3. OUTPUT
4. STORAGE
INFORMATION TECHNOLOGY
Information technology toos are used to processing data. Example of IT : Calculators,
watches, typewriters,talaphones, television, appliances and various handheld devices,
computer etc.
Main device in IT is the computer.The computer embeds All other IT tools.
COMPUTER - is the set of devices that work under control of stored program, works
automatically.
(NB: this definition is complete so if you need it find to others who complete it)
FUNCTIONS OF COMPUTERS
 INPUT- collecting data
 PROCESS - converting data into information.
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OUTPUT - Display results
STORAGE - For future use.
CHARACTERISTICS OF COMPUTERS
Speed
Accuracy
Storage
Diligence
Versatile
Reliable
No IQ
No feelings
Cheap
Expensive
MAIN PARTS OF COMPUTERS
A computer system consists of two main parts;
 HARDWARE - Physical part
 SOFTWARE - Instructions