A keyboard
B-A mouse
Keyboards and Mice
An input device. In fact it is the ONLY way to input data into a computer. However, the most common input device is the computer's hard-drives or mass-storage devices (which are also output devices), followed by the mouse and keyboard.
In order to feed any instruction or data int a computer, one has to use input devices. The most common input devices are the keyboard, mouse and microphone.
Computer input devices are peripheral devices that provide data and control signals to the computer. The keyboard and mouse are the most important input devices.
Keyboard & Mouse
Keyboard Mouse Floppy Drive Memory Stick Microphone Camera/Scanning Device
The two most common are a printer and a screen. CD /DVD burners can be considered output devices as well as input devices as can flash drives.
input ;keyboard ,mouse output: monitor , speaker , printer
If you are talking about computers there are a number (basically anything that collects data): Keyboard Mouse Digitizer Scanner A camera could also be considered an imput device
they are types of hardware
Computer Peripherals.