Speaking at Google's developer's conference in San Francisco today, Sergey Brin launched some fresh nomenclature into the jargony culture of computer programmers: "Page's Law." He was trying to make a point about the speed of Google's Web apps; instead he's done co-founder Larry Page a huge favor.

"Page's Law" seems destined to become a common companion term to "Moore's Law," a widely-used tech aphorism that says, roughly speaking, that computers double in speed every year or two.

Page's Law is the inverse: It says software gets twice as slow every 18 months. This helps explain why your computer seems to get slower as it ages, even though the hardware inside remains unchanged.

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Brin explains the concept in the clip above. He adds that Google plans to reverse this trend and optimize its code. Whatever; the important thing is that it helps his buddy Larry get his name into the history books, in case this Google thing doesn't work out.