One who, or that which, adds; esp., a machine for adding numbers.

Is a register that sums two numbers. There are many different variations; a few examples are full, ripple-carry, skip-carry and select adders.

A digital circuit which forms the sum and carry of two or more numbers.

A device capable of forming the sum of two or more quantities.

a person who adds numbers

a machine that adds numbers

a combinatorial circuit that computes the sum of two or more numbers

In electronics, an adder is a digital circuit that performs addition of numbers. In modern computers adders reside in the arithmetic logic unit (ALU) where other operations are performed. Although adders can be constructed for many numerical representations, such as Binary-coded decimal or excess-3, the most common adders operate on binary numbers.