One year or two

One of the interesting things about Moore’s Law is that it actually exists in several different versions. In teaching, I tend to use the version where the amount of processing power available for a certain cost, or on a certain sort of chip, doubles every 18 months. I’m in good company: Brown and Duguid (2002: 14) suggest that Gordon Moore ‘predicted that the computer power available on a chip would double approximately every eighteen months’.

But in fact Moore’s original paper, available at , suggests that he expected computing power to double every year, and the background information at mostly refers to it doubling every two years, suggesting that Moore himself recognised that progress had slowed down a little by the 1970s.

Brown J S and Duguid P (2002): The social life of information. Harvard Business School Press.



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