This picture taken on September 5, 2016 shows the logo of French IT company Linkbynet at their offices in Ho Chi Minh City. A decade ago app technology would likely have been developed in California's Silicon Valley, but today those apps are being churned out by Vietnam's startup sector -- an industry driven by local techies trained overseas but returning home to prowl for opportunities. / AFP PHOTO / STR / TO GO WITH Vietnam-technology-economy-startups,FOCUS by Hervé ASQUIN, with Jenny VAUGHAN in Hanoi STR/AFP/Getty Images