Here are two clearly different types of robots used in two clearly different situations
The Roomba Vacuum Cleaner
The ‘Roomba’ is an autonomous robot Vacuum cleaner. The robot is simply amazing it has up to 120 minutes of power and automatically goes back to its charging station when running low! It increases intensity when it detects dirt and it can adjust to different types of surfaces. When the Roomba bumps into walls or table and chair legs, it will change direction until it finds a path free from obstacles. It can also be controlled by an infra-red remote 
! The most important part of the Roomba vacuum cleaner would be its drive; it wouldn’t be an autonomous vacuum cleaner if it couldn’t move by itself. Autonomous Underwater Vehicle
An Autonomous Underwater Vehicle (AUV) is a robot which is used to explore deep underwater areas, where people cannot go. They are battery-powered and can operate in water as deep as 6000 meters. The oil and gas industry uses AUVs to make detailed maps of the seafloor before they start building subsea infrastructure. The detailed maps from the AUVs allow the Oil Companies to install pipelines and sub-sea completions in the most cost effective manner with the minimum disruption to the environment. Scientists also use AUVs to study the ocean and the ocean floor. The most important part of the AUV would probably be its sensor. Without the sensor, it would have no use, as it is used to create detailed maps of its surrounding, it cannot do that if it has no sensor.
Parts of a Robot »« Purpose and Use of Robots
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