INTRODUCTION TO COMPUTER
Computer can be defined as an electronic device which can:
- Accept data
- Processing data
- Give output in readable and understandable language called information
- Store data/information
TYPES OF COMPUTER
- Super computer
- Mainframe compuer
- Personalcomputer
- Laptop computer
COMPUTER SYSTEM
Is a combination of two element which are
- HARDWARE
- SOFTWARE
HARDWARE: This refered to all physical parts of a computer which can be seen or touched the following are the hardware example CPU,VDU,KEYBOARD,MOUSE,PRINTER,SCANNER,CABLES
TYPES OF HARDWARE
There are three types of hardware namely
- Input device
- Output device
- Input/output device
INPUT DEVICES:
These sends data/information inside the computer (CPU). They are
- Keyboard
- Mouse
- Scanner
OUTPUT DEVICE
These extracts data/information from the compute, these are
- VDU
- Printer
- Speaker
INPUTOUTPUT DEVICES
These send data/information from the computer, they are
- Data cables
- Modem
- Fax
- Central processing unit (CPU)
SOFTWARE: Can be defined as a program use by computer
PROGRAM; Is a detailed set of instruction written in a computer language which tells the computer how to process the input data and generate different output.
TYPES OF SOFTWARE: There are two types of software which are
SYSTEM SOFTWARE: These acts as a translator or an interface between the use and the computer, so that the user can access the hardware with case. Example of system software are: WINDOW 95/98/2000, WINDOW XP,WINDOW7,WINDOW8,WINDOW10,WINDOW11
APPLICATION SOFTWARE: These are the instruction written in computer for doing a specific task or job within a computer.Computer does not understand plan language; or other languages rather than its own language hence one must communicate or talk with them using this language. Example of Aplication Software : WORD PROCESSING,SPREAD SHEET,DATABASE,PACE MAKER, ETC