input
A normal computer monitor is simply an output device; it takes no input from the user. A touchscreen monitor, on the other hand, is both an input and an output device.
It is an input device. Like other input devices, it takes information so it can be processed/stored. An output device, on the other hand, takes care of the displaying or presenting of already processed/stored information.
The processor puts information into an acceptable form for your computer. The input output channel is a physical link that connects the computer to an output or input device.
A scanner is an output device because it doesn't receive data it only sends out data.
electricity
A monitor is first and foremost an Output Device because it displays information already held in the computer. Touchscreen monitors that allow you to input information or to use navigational features such as menus, icons and so on are also Input Devices. Another example of a device that is both an input and output device is a joystick with Force Feedback technology.
it all depends on how hard you lift of push your hand.
Work Input- The work done on a machine as the input force acts through the input distance. Work Output - The work done by a machine as the output force acts through the output distance (What the machine does to the object (dependent on the force) to increase the output distance).
Perhaps it would be better for you to research what "output device" means. If you need to output something, you need an output device. There is simply no alternative to which you can compare it.
becouse its have more input
Its a device with the help of which we can send input to out computer system. Few examples of these devices are keyboard, mouse etc. On the other hand we also have few output devices like printer and monitor.
If it is anything like most standard printer of todays time and place they are now bi-direction so they are input-out-put as they take and give you only out-put in you hand as hard-copy information... basiucally printed paper with images, ectra.... but if it multi-fuction laser printer of today it can also give input to the computer via it's buitl; in scanner unit and fax unti and or phone unti, and or camera usb port retrieval unit .. makin it the newert styled input-output device...