Moore's law

Moore's law
Moore's law is the observation that over the history of computing hardware, the number of transistors on integrated circuits doubles approximately every two years.

The law is named after Intel co-founder Gordon E. Moore, who described the trend in his 1965 paper.
The paper noted that the number of components in integrated circuits had doubled every year from the invention of the integrated circuit in 1958 until 1965 and predicted that the trend would continue "for at least ten years".
His prediction has proven to be uncannily accurate, in part because the law is now used in the semiconductor industry to guide long-term planning and to set targets for research and development.
http://en.wikipedia.org/wiki/Moore's_law