Microsoft chairman Bill Gates has unveiled an ambitious effort to transform Microsoft's software products into internet-based personal services.

The move is described by its officials as one of the biggest gambles the company has ever taken.

The initiative, called Microsoft.NET, will allow individuals to access data from a wide array of devices, including personal computers, handheld organisers and cell phones.

Mr Gates said: "We have the opportunity to take this vision of a digital world and apply the magic of software to make this a reality."