During 1999, Citrix's thin-client model became a software trend, and the company's customers increased to 15 million.[5] Major clients included Sears, AT&T, and Chevron.[7][11] In 2000, the burst of the dot-com bubble led to Iacobucci leaving the company and CEO Mark Templeton being demoted to the president and senior executive officer. Templeton was later reinstated in 2001.[16][18]