# Machine code |  | In computer programming, **Machine code** is computer code consisting of machine language instructions, which are used to control a computer's central processing unit (CPU). Although decimal computers were once common, the contemporary marketplace is dominated by binary computers; for those computers, machine code is "the binary representation of a computer program which is actually read and interpreted by the computer. A program in machine code consists of a sequence of machine instructions ." | |-|-| | | wikipedia:: [Machine code](https://en.wikipedia.org/wiki/Machine_code) |