An oil refinery is an industrial cathedral, a place of power, drama and dark recesses: ornate cracking towers are its gothic pinnacles, flaring gas its stained glass, the stench of hydrocarbons its heady incense. Data centres, in contrast, offer a less obvious spectacle: windowless grey buildings that boast no height or ornament, they seem to stretch to infinity. Yet the two have much in common. From an article on The Economist: A new commodity spawns a lucrative, fast-growing industry, prompting antitrust regulators to step in to restrain those who control its flow. A century ago, the resource in question was oil. Now similar concerns are being raised by the giants that deal in data, the oil of the digital era (Editor's note: the link could be paywalled; alternative source). These titans -- Alphabet (Google's parent company), Amazon, Apple, Facebook and Microsoft -- look unstoppable. They are the five most valuable listed firms in the world. Their profits are surging: they collectively racked up over $25bn in net profit in the first quarter of 2017. Amazon captures half of all dollars spent online in America. Google and Facebook accounted for almost all the revenue growth in digital advertising in America last year. Such dominance has prompted calls for the tech giants to be broken up, as Standard Oil was in the early 20th century.