Mickey is the unit of measurement for the speed and movement direction of a computer mouse. One mickey is approximately 1/200th of an inch. The speed can be measured in “pixels per mickey”, the ratio between how many pixels the cursor moves on the screen and how many centimetres you move the mouse on the mouse pad. The directional movement is called the horizontal mickey count and the vertical mickey count.
Clock speed is measured by how many ticks per second the clock makes. The unit of measurement called a hertz (Hz), which is technically one cycle per second, is used to measure clock speed. In the case of computer clock speed, one hertz equals one tick per second. The clock speed of computers is usually measured in megahertz (MHz) or gigahertz (GHz). One megahertz equals one million ticks per second, and one gigahertz equals one billion ticks per second.
You can use clock speed as a rough measurement of how fast a computer is. A 2.0GHz computer will run faster than a 1.4GHz computer with the same processor and the same amount of memory. However, you cannot use clock speed to compare computers with different types of processors or computers with different amounts of memory.
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