However, it is mainly used by educated young white males with access to money - so they benefit, while others are left out in the cold.

BBC: Internet increases global inequality - UN

In Yerevan, Armenia, where I was last May, I noticed buses and lorries resplendent with rusty-looking cylinders of gas as their fuel supply, which is more cheaply obtained than liquid fuels, but I emphasise that it is petroleum gas (mainly propane and butane) that is used there and not biogas.

FORBES: U.K. Joins Europe On Biogas 'Waste Into Energy' Strategy

As HR applications reach all employees within a company, it is potentially a bigger market than the CRM software which is used mainly by the sales team.

FORBES: Salesforce Takes On Dropbox With Cloud Storage And File Sharing Services

"That channel is mainly used by developers, but it's worth letting them know if you have concerns about an app and you aren't getting useful responses from the developer, " he said.

CNN: 'No permission' Android apps can see and share your data

It does not operate out of Stansted, which is used mainly by low-cost carriers such as easyJet and Ryanair.

CNN: UK's Stansted expansion challenged

It was originally intended as a reserve currency, but is now mainly used in the accounts for the IMF's transactions with member countries.

ECONOMIST: China suggests an end to the dollar era

Ethanol, which is used mainly as an additive to petrol, is not a particularly good fuel: it offers only about two-thirds as much energy as petrol and can corrode pipelines and car engines.

ECONOMIST: America's biofuel muddle