In technical informatics computer units conduce for the machine code of computer software. As well it is known as arithmetic logic unit (ALU). Precisely on its own the ALU presents just the central component of the computer unit. A computer unit can consist of more than one ALU. Floating point computer units are built up of two arithmetic logic units to modify mantissa and exponent of an floating point number separately. In addition it consists of status and utility register. In present, high performance computer have multiple computer units, which independently wait for instructions.