UPS = Uninterruptible Power Supply
power supply is a device that supplies electric power to electrical load
Advantage of regulated power supply.
all about regulated power supply
Asymmetrical
any power supply with at least 175 watts
variable dc supply are used to get desired amount of dc supply
If it is a computer power supply it is the box that gives the computer its power from the outlet.
Power amplifierPower supply regulatorSwitching power supply chopperetc.
To keep the power supply cool. If there were no fan the power supply would overheat and fail.
If you mean horizontally asymmetrical there are 15: BCDEFGJKLNPQRSZ If you mean vertically asymmetrical there are 17: AFGJLMNPQRSTUVWYZ
Now it is considered by most scientists that the universe is asymmetrical.