More detailed analysis on the outlook for the IT industry is available in the complimentary webinar "IT Spending Forecast, 2Q19 Update: Market Disruptions and the Disruptors." Gartner's IT spending forecast methodology relies heavily on rigorous analysis of sales by thousands of vendors across the entire range of IT products and services. Gartner uses primary research techniques, complemented by secondary research sources, to build a comprehensive database of market size data on which to base its forecast. The Gartner quarterly IT spending forecast delivers a unique perspective on IT spending across the hardware, software, IT services and telecommunications segments. These reports help Gartner clients understand market opportunities and challenges. The most recent IT spending forecast research is available to Gartner clients in " Gartner Market Databook, 2Q19 Update ."