Electrified wire laid around the perimeter of the yard sends a signal to the mower that it has reached its limit. These robots can carry video cameras and tools and perform needed repairs. In the medical field, some hospitals use robotic messengers to carry supplies and equipment from one place to another. Robots can even help during certain types of microsurgery. This lets surgeons perform delicate procedures that would otherwise be too fine for human hands.
Surgeons using other medical robots can operate on patients remotely.