Economic uncertainty surrounding the U.S. government sequester, European debt crisis and weakening GDP in China has resulted in volatile spending patterns across most segments of the market.

According to the latest market study by International Data Corporation (IDC), as a result of the current economic climate, business technology spending was slightly below expectations in the second half of 2012 and first quarter of 2013.

IDC now projects worldwide IT spending growth of 4.9 percent this year in constant currency, down from the previous forecast of 5.5 percent growth — and representing a slowdown from the 5.6 percent growth recorded in 2012. As a result, IT spending will reach $2.06 trillion in 2013. Including telecom services, ICT spending will increase by 4.5 percent to $3.7 trillion.

So, what are the key trends that are shaping the updated global forecasts?

Deteriorating PC shipments

The reduction in …