In computers, the input devices are mouse and keyboard while in neural system, the sensory neurons act as input devices which take inputs from the environment.

The message from input devices is sent to the brain in neural system and to the CPU in computers.

The CPU processes the information and gives command to the output devices i.e. monitor and printer. The brain processes the information from the input devices.

The brain commands the concerned organs accordingly. This is done with the help of motor neurons which act as the output devices in neural system.