PRESENTED BY THE MEMBERS OF GROUP B COMPUTER SCIENCE DPT.
• The I/O devices as parts of the components of an information processing system or a computer system are those devices which enables the computer system to communicate with the outside world. As we all know from the concept of communications in English language that communication is said to have being completed only when the encoder (sender) must have received a feedback from the decoder (other user), this can only be possible only when there are good and effective communication gadgets to help fascinate this process. • Now, back to the concept of electronic information processing system (Computer system), we all know that communication between the computer system and the outside world (user) would be almost impossible if there are no adequate console I/O devices to enable the user send their commands (data) into the computer system for processing and also to get feedback (i.e. already processed data) through a good working console output device (monitor).
DEFINITION OF TERMS
• • INPUT DEVICES: These are those devices that enable the user to send data or commands into the computer for processing. OUTPUT DEVICES: These are those devices that fetch the user’s information or already processed data from the computer main-memory (RAM) through the console output device (monitor).
I/O DEVICES: These are those devices that enable the computer to communicate with the outside world.
CONSOLE INPUT: These refer to those indispensable input devices that must be present in any computer system. e.g. Keyboard and mouse. CONSOLE OUTPUT: These refer to those indispensable output devices that must be present in any computer system. e.g. Monitor. Since there are so many I/O devices, we can now classify them into the following categories: Input Device and Output Devices, and also highlight their principle of operations, usage and