On the topic of pallets, Jacob Hodes writes:
There are approximately two billion wooden shipping pallets in the United States. They are in the holds of tractor-trailers, transporting Honey Nut Cheerios and oysters and penicillin and just about any other product you can think of: sweaters, copper wire, lab mice, and so on. They are piled up behind supermarkets, out back, near the loading dock. They are at construction sites, on sidewalks, in the trash, in your neighbor’s basement. They are stacked in warehouses and coursing their way through the bowels of factories.
The magic of these pallets is the magic of abstraction. Take any object you like, pile it onto a pallet, and it becomes, simply, a “unit load”—standardized, cubical, and ideally suited to being scooped up by the tines of a forklift. This allows your Cheerios and your oysters to be whisked through the supply chain with great efficiency; the gains are so impressive, in fact, that many experts consider the pallet to be the most important materials-handling innovation of the twentieth century.
And there is this:
Not all pallets belong to the world of whitewood. The most important other category—and whitewood’s chief antagonist—is the blue pallet. These blues are not just a different color; they are also built differently, and play by different rules, and for the past twenty-five years, the conflict between blue and white has been the central theme in the political economy of American pallets.