A special-purpose processing unit that assists the CPU
in performing certain types of operations. For example, a math coprocessor
performs mathematical computations, particularly floating-point
operations. Math coprocessors are also called numeric
Most computers come with a floating-point coprocessors built in. Note, however, that the program itself must be written to take advantage of the coprocessor. If the program contains no coprocessor instructions, the coprocessor will never be utilized.
In addition to math coprocessors, there are also graphics coprocessors for manipulating graphic images. These are often called accelerator boards.