Possibly writing instruments of various sorts.
It depends where you are in the world. In North America the most common used voltage is 120/240 and the frequency is 60 Hertz.
We use appliances to make our lives easier. We can do a lot of things in short period of time using appliances.
Most traditional appliances will work in an house boat. However, RV dealers may be able to offer you new or used small RV appliances to use on a house boat.
It works faster than most other heating appliances, and most don't have too many buttons
EnergyStar is a government backed program to help people find and use the most energy efficient appliances. You can save up to 30% on your energy bill by switching.
All home kitchen appliances use electrical energy.
All electric appliances use amps. Amps are a measure of current.
Camping World is a great place to find RV appliances, as well as anything else you'll need on the road. You can also try RV warehouse, which carries most of the same products.
Scratch dent appliances are just that, your regular appliances that are either scratched or dented. These appliances can be purchased at a discounted price from most of your regular retailers.
Various steps are being taken. They include avoiding the use of more CFC's in appliances.
appliances that provide heat energy
I would suggest looking for EnergyStar rated appliances. These appliances can use up to 30% less energy than other appliances. Here's some info from Wikipedia: http://en.wikipedia.org/wiki/Energy_Star