Cloud computing is set to play a central part in the world's largest IT industry fair, CeBit.

The event, which begins this week, will bring together more than 4,200 companies from 70 countries. The five-day fair will be held in Hanover, Germany, and is expected to attract as many as 350,000 attendees.

According to an AFP report, two heads of state will attend the fair - Germany's chancellor Angela Merkel and Turkey's prime minister Recep Erdogan. Turkey is the event's "partner country" this year and is expected to be represented by approximately 100 companies.

"CeBIT 2011 is the heart of the digital world and will show how rapidly the pulse of the IT industry is beating," said Ernst Raue, board member of Deutsche Messe, the organization that organizes the event.

In the lead up to the event, BITKOM, which represents Germany's telecommunications and IT sectors, released predictions for the IT market. According to BITKOM, the global IT market will grow 4.8 percent to a total value of $3.6 trillion in 2011.