The Mister Handy series of robots, named so because of the robot's large number of hands, was first brought to market in 2037 as a general construction and maintenance unit by General Atomics International, with some assistance from RobCo. Primarily used in the United States and Mexico (where it was the leader in sales after the Mexico City earthquake of 2042), the Mister Handy was a reliable robot. An early bug that caused interference in the operation of the multiple arms was fixed with a hardware update in 2039, with no major problems since then. A key selling feature is the nuclear power unit (a model 238B, licensed from Calpower) and self-maintenance modes. Multiple Mister Handies are capable of keeping themselves in working condition and are also fully programmed to perform nuclear fuel replacements. Secondary programming handles radiation cleansing after refueling.
In Hell's Motel, there is a crazed Mister Handy that was used as a tool by the now deceased Doctor Rotson's. In New Vegas Steel, the crazed Mister Handies were participants in the factory automation test, which has been running for 204 years. As a result, the Steel Mills still continue to function.
This type of Mister Handy is the hardest one to sneak up and deactivate, and once detected, they will keep looking for the player even though his/her status is hidden.
Maintenance robots are light green-painted, smaller versions of Mister Handy found in REPCONN headquarters. Attacking one, and failing to destroy it within 3 seconds will trigger an alarm, summoning sentry bots.
The maintenance robots may engage in conversation between themselves, or the Mobile facial scanners. This occurs when the player is hidden, or the player is authorized to access all floors.
A smaller variant of the Mister Handy, the mobile facial recognition scanners patrol the hallways of REPCONN headquarters to keep any, and all unauthorized personnel out of restricted areas. Upon finding an unauthorized person or group, they will address the person, or the leader of the group, and request that they verify their access, or leave the premises. Failure to verify will result in an admonition to leave within 30 seconds, after which an alarm will sound, and sentry bots are summoned. The mobile facial recognition scanners can be killed or deactivated to prevent the alarm as long as the kill is not witnessed by another maintenance robot, or mobile facial recognition scanner, and they haven't already told the Courier to leave the floor.
You can find the facial database terminal on each floor, which means you'll need to authorize 3 times to avoid setting off the alarm.
In one of the two factory floors in Sunset Sarsaparilla Headquarters there's one bottling robot who appears to be friendly at first. However, when it discovers the Courier is not a Sunset Sarsaparilla Corporation employee, it will turn hostile. On the floor, several broken bottling robots can be looted for some flamer fuel. For security reasons, the Bottling robot will turn hostile towards the player if they are detected attempting to sneak past it.
Broken custodial robots can be found in the Sunset Sarsaparilla Headquarters, by heading up the stairs on the factory floor. There are two broken custodial robots in the factory, found near the two shipping workers, and bottling robot, and they are the only Mister Handy robots that can be looted for some bottle caps as well as flamer fuel and scrap metal.
One unique named Mister Handy, a "broken personal assistant", can be found on the same floor as the two broken bottling robots, at the end of the hallway in a room. Like the name suggest, it probably once belonged to an executive of the Sunset Sarsaparilla Headquarters. This seems even more likely considering his inventory consists of a pencil, clipboard, shot glass, and various other service-related items.