But a large part of Nokia's success is due to its early recognition that mobile telephones are more than portable communication devices, but also fashion items.

ECONOMIST: Microsoft and the Great Game | The

Vonage sells both cordless, portable phones and wireless adapters for standard telephones.

FORBES: Will Vonage Pay Up Or Shut Down?

The most futuristic product is a tiny fuel cell to produce power for use in portable applications, from hedge trimmers to mobile telephones.

ECONOMIST: Fuel cells: Intel on wheels | The

Sunil Mittal has made Delhi's Bharti Enterprises a shining example of entrepreneurial success: he was the first to bring portable generators into India, and proceeded to import the country's first push-button telephones.

ECONOMIST: Which way to capitalism?