To get a sense of how big this Big Switch is, Carr points to a similar revolution: the advent of electricity.

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The industry body points to research saying people do not switch banks very often because they are happy with the products and services they receive.

BBC: Do we ever switch bank accounts?

Mr Brown also said the government was launching a new website, ChargePlace Scotland, which will allow the public to find charging points and detail financial help available to switch to an electric vehicle.

BBC: Plan for electric car charging points across Scotland

In his latest book, tech pundit Nicholas Carr put a name on a trend that's transforming information technology: As the world becomes more networked, he points out, computing power is undergoing "the Big Switch, " moving off of desktops and into massive data centers, where it's cheaper and more efficient.

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Hazlett points to the company's success at making a similar switch in Germany.

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Stewart Wolpin, an analyst with market research group Points North, says only 13% of consumers know about the digital switch.

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The analyses presented at a European cardiology meeting last week differed on some key points, and some doctors say it is too early to decide to switch back to bare metal stents.

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