Flops is an acronym of floating point operations per second. It is a measure of a computer's performance, especially in fields of scientific calculations that make heavy use of floating point calculations.
The term floating point refers to a particular format for numbers (scientific notation) within the computer that is used for scientific calculation. A floating point operation refers to a single arithmetic step, such as multiplying or divid- ing two numbers, using the floating point format. Thus, FLOPS measure the speed of the arithmetic processor.