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Dell’s first convertible tablet PC will probably be sold this year. The company is working on the machine and showed a prototype of it on a company blog.

According to Jeff Clarke, senior vice president of Dell's business product group, the company is introducing to the market the tablet PC later this year.

The product is aiming the education, health care and corporate markets. The tablet PC will be one of the lightest weight tablet PCs in the market.

Tablet PCs still only account for a fraction of the portable PC market but growth in the sector is expected to outperform the overall market over the next few years, according to IDC.

According to IDC Shipments of convertible tablet PCs like that planned by Dell are expected to total 1.5 million units this year.