atentoExperienciaAtento S.A. (NYSE: ATTO), the largest provider of customer-relationship management and business-process outsourcing services in Latin America, and among the top three providers globally, today announced its fourth-quarter and full-year 2015 operating resultswhich include solidly higher revenue and adjusted EBITDA (earnings before interest, taxes, depreciation and amortization) forthe year.Those and all comparisons in this announcement are year-over-year, on a constant-currency (CCY) basis unless noted otherwise. Read more