Anyone can go in but of course the owner reserves the right to refuse entry.

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Like humans, they need to convert energy from natural raw materials, replenish reserves and of course, address the issue of waste management.

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Of course, they still need some reserves, to smooth out temporary gaps in the demand and supply of foreign currency.

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The problems with Social Security are now largely known--the declining number of workers versus retirees, the fiscal irresponsibility of pay-as-you-go (it's the public-sector equivalent of a private pension system with no reserves, which, of course, is illegal).

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Of course, it has years to go to reach production even if its reserves are the largest.

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Some bond investors are fretting that the overhang of bank reserves created by the central bank's policy over the past couple of years could in due course result in a sharp jump in inflation.

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