Program

ASSIGNMENT NO:1 Inroduction-In computing, input/output or I/O is the communication between an information processing system (such as a computer) and the outside world, possibly a human or another information processing system. Inputs are the signals or data received by the system, and outputs are the signals or data sent from it. The term can also be used as part of an action; to "perform I/O" is to perform an input or output operation. I/O devices are used by a person (or other system) to communicate with a computer. For instance, a keyboard or a mouse may be an input device for a computer, while monitors and printers are considered output devices for a computer. Devices for communication between computers, such as modems and network cards, typically serve for both input and output.
+Some commonly used Input/Output devices are listed in table below<
Input Devices Output Devices 1.Keyboard 2.Mouse 3.Joystick 4.Scanner 5.Light Pen 6.Touch Screen 7.Monitor 8.LCD 9.Printer 10.Plotter

II. Input Devices
(a) Keyboard It is a text base input device that allows the user to input alphabets, numbers and other characters. It consists of a set of keys mounted on a board.The kyes are Alphanumeric Keypad , Function Keys , Special-function Keys , Enter etc. (b) Mouse The mouse is a small device used to point to a particular place on the screen and select in order to perform one or more actions. It can be used to select menu commands, size windows, start programs etc. The most conventional kind of mouse has two buttons on top: the left one being used most frequently. Mouse Actions- left click ,double click ,right click etc. (c) Joystick The joystick is a vertical stick which moves the graphic cursor in a direction the stick is moved. It typically has a button on top that is used to select the option pointed by the cursor. Joystick is used as an input device primarily used with video games, training simulators and controlling robots. (d)Scanner

Scanner is an input device