Software as a service or "SaaS" enterprise applications are on track to reach $50.8 billion in sales over the next three years, according to a new IDC report. In IDC's Worldwide SaaS Enterprise Applications 2014-2018 Forecast, the research firm provides current size estimates for the SaaS enterprise application market and a 2014-2018 forecast. According to IDC, worldwide revenue for the market was $22.6 billion in 2013 and will experience a compound