CPU >The central processing unit(CPU) is the brain of a computer >retrieves instructions from memory and executes them measured in megahertz(MHz), with 1 megahertz equaling million pulses per second. 1 gigahertz is 1000 megahertz Liang, Introduction to Java Programming, revised by Dai-kaiyuLiang, Introduction to Java Programming,revised by Dai-kaiyu 6 CPU ØThe central processing unit (CPU) is the brain of a computer Øretrieves instructions from memory and executes them. Ø measured in megahertz (MHz), with 1 megahertz equaling 1 million pulses per second. 1 gigahertz is 1000 megahertz