Six of the world's 10 busiest ports are located in China, when measured in terms of cargo shipped in standard containers, or TEUs (20-foot equivalent units).

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The biggest ships in use at the moment can carry around 15, 000 containers (TEUs or twenty foot equivalent units) but in 2013 ships capable of carrying 18, 000 containers are due to arrive.

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The number of TEUs (the large containers on ships: twenty-foot equivalent units) moving through the ports of Los Angeles and Long Beach is up 23% in May year-over-year and up 26% since the beginning of the year.

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Last year U.S. ports handled 20.8 million TEUs, or units equivalent to one over-the-road trailer, down from 31% from 2007.

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By the year 2000, over-capacity will have risen from 18m to 22m units equivalent to 80 of the world's 630 car assembly factories standing idle.

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That gives Apple enough memory to crank out the equivalent to between 60 million and 75 million 8-gigabyte units during the second half of this year, Handy argues, up from 30 million units during the same period last year.

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That is equivalent to 7% of Toyota's global production target of 7.7 million units for 2011.

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