In North America 120/240 is the main voltages used. It is known as a three wire system. L1 to L2 supplies 240 volts. L1 to N supplies 120 volts and L2 to N supplies 120 volts.
Insects are more commonly found in homes than spiders.
The average bathtub length commonly found in residential homes is around 60 inches.
The tiny long black bugs commonly found in homes and gardens are called "springtails."
The tiny hard shell bug commonly found in gardens and homes is called a "beetle."
A mirror is an object that reflects light and is commonly found in many homes.
The small flat round brown bug commonly found in homes and gardens is called a "cockroach."
In residential homes, right-handed doors are more commonly found than left-handed doors.
Common types of brown bugs found in homes include cockroaches, carpet beetles, and stink bugs.
Giant rats can commonly be found in sewers and drainage systems throughout the city. These are common homes for them as they are secluded from humans.
The small ant-looking bugs commonly found in homes are called ants. They can be controlled by keeping food sealed, cleaning up spills promptly, and using ant baits or sprays.
+12V, -12V, +5V, -5V, +3.3V
There is no list in the question! But I think that laser printers (colour or mono) are not commonly found in homes. The commonest printers are the inkjets that print in colour using coloured ink cartridges. Personally, I prefer my mono laser printer that uses a black toner.