In a landmark decision, representatives from 60 countries voted to redefine the International System of Units (SI), changing the world's definition of the kilogram, the ampere, the kelvin and the mole ...

The primary computer equipment. Housed in a desktop or floor-standing cabinet, it contains such components as the motherboard, CPU, RAM and ROM chips, hard and floppy disks and several input/output ...

The system of weights and measurements adopted by the British Empire in 1824. The U.S. system is sometimes called the Imperial system; however, it is actually the United States customary units. THIS ...