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Taylor Ragan Danielle Lorentz Katie Henley It is the part of a computer processor, and it is a digital circuit that adds two numbers that are sent from the processing instructions. There are two types: full and half adders. If an adder has an input carry, it is a full adder, otherwise it is a half adder. Adders Half Adder redstuff.wikia.com Adders are classified by two criteria: the number of bits of input and output and whether or not it has an input carry. Full Adder http://computer.howstuffworks.com/boolean3.htm Credits: http://www.computerhope.com/jargon/a/adder.htm http://www.knowledgerush.com/kr/encyclopedia/Adder_(electronics)/