(Telecompaper) Worldwide IT spending is projected to total USD 3.7 trillion in 2013, up 4.2 percent increase from 2012 spending of USD 3.6 trillion, according to Gartner. The market researcher revised upwards its 2013 outlook for IT spending growth from 3.8 percent in the Q2 2012 forecast. Worldwide devices spending, which includes PCs, tablets, mobile phones and printers, is forecast to reach USD 666 billion in 2013, up 6.3 percent. However, this is a significant reduction in the outlook for 2013 compared with Gartner's previous forecast of USD 706 billion in worldwide devices and 7.9 percent growth. The long-term forecast for worldwide spending on devices has been reduced as well, with growth from 2012 through 2016 now expected to average 4.5 percent annually (down from 6.4%) and 5.1 percent annually in constant dollars (down from 7.4%).