Moore's law cost. The acknowledged first documented qualitative description of this dates from 1885. A power curve was used to describe this phenomenon in a 1936 discussion of the cost of airplanes. Moore's law Moore's law is the observation that the number of transistors in a dense integrated circuit doubles about every two years. The observation is named after Gordon Moore, the co-founder of Fairchild Semiconductor and Intel, whose 1965 paper described a doubling every year in the number of components per integrated circuit, and projected this rate of growth would continue for at least another decade. In 1975, looking forward to
Rule of 72 by 200/(200−"r") as follows: For example, if the interest rate is 18%, the rule of 69.3 says "t" = 3.85 years. The E-M rule multiplies this by 200/(200−18), giving a doubling time of 4.23 years, where the actual doubling time at this rate is 4.19 years. (The E-M rule thus gives a closer approximation than the rule of 72.) Note that the numerator here is simply 69.3 times 200. As long as the product stays constant, the factors can be modified arbitrarily. The E-M rule could thus be written also as in order to keep the product mostly unchanged. In