The MGM Grand is a fully-operational theatre, with two tiers of steeply banked seating.
Nokia's strength has split the top five into two tiers: itself and everyone else.
But dividing workers into two tiers, those whom management pampers and those it treats as dumb labour, is another matter.
"There are two tiers, with more-developed on one and less-developed on the other, " Myanmar minister David Abel told Asiaweek in Hanoi.
The massive stadium holds 90, 000 people and the Londoners will have been pleased to virtually sell out the bottom two tiers.
Where there are still two tiers of local government, one will have to go to make way for a regional assembly.
"Each club that wanted to play in the top two tiers of the Bundesliga -- 36 clubs -- had to have youth academy, " he said.
Where 3rd-generation Core graphics were divided into two tiers, the new generation is focused on three, two of which are built for performance over efficiency.
You shouldn't create a pricing mechanism where only the biggest firms can pay for it, and by doing it that way, you really are creating two tiers.
The theme-park industry has two tiers.
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The Ryan outline by design does not include specifics other than a general instruction to the Ways and Means Committee to overhaul the corporate tax code and simplify the seven individual brackets into two tiers with a top rate of 25%.
Supply chains, for various reasons, can be notoriously opaque especially for items that are provided by a supplier that may be two or three tiers away from a core supplier.
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They also rebranded two of their lower tiers to the Snapdragon 400 and 200.
The reason too many of the public services we inherited were stuck in the past, in terms of choice and quality - and the two or even more tiers of service they offered - was because their funding, infrastructure and service standards were stuck in the past too.
BBC: NEWS | UK | Politics | Full text: Blair on public services
This week's proposals for an Anglican Communion of two (or more) tiers sound like an attempt to recognise reality rather than to shape it.
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