Ultimate laptop

An estimate for the maximum memory is not so straightforward. The memory is limited by the entropy of the system, and the number of operations per second depends also on the temperature. Lloyd [4] estimates the maximum memory space of the ultimate laptop as approximately lO bits and the maximum number of operations per bit per second it can perform is about 10. ... 

Of course, usual computers will probably never achieve the performance of the ultimate laptop, but this is not the point. What is important here is that first the recognition that natural phenomena can be interpreted as computing processes, and second that the laws... 

Duty drawback and duty avoidance are worth modeling. Shown are three ways to take advantage of import duty relief. When printers imported from China enter Europe, a duty of 4.9% is due. Europe also imports LCD displays from Taiwan and motherboards from the United States to manufacture laptop PCs which it exports to Taiwan and the United States. Laptop PCs with printers are exported from the United States to BraziL Because the printers from China went through Europe and were ultimately shipped to Brazil, they are eligible for European duty drawback for re-export in the same condition. Usually the same printers imported into Europe from China need not be re-exported to Brazil they need only be fungible, that is, equivalent. Europe imports LCDs from Taiwan, then re-exports them to Taiwan in laptop computers. It avoids the 4.9% LCD duty due in Europe because of re-e x>rt in a different condition. The LCDs reimported into Taiwan also create an opportunity for duty avoidance for domestic goods returned in different condition. 

Perhaps the first real commercial PEFC system to reach mass production will be the portable DMFC. Ultimately, the DMFC system must replace some existing power source. Take the laptop computer system as an example for comparison purposes ... 

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